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1. 3D DEM tillage simulation: Validation of a hysteretic spring (plastic) contact model for a sweep tool operating in a cohesionless soil

Author:
Mustafa Ucgul; John M. Fielke; Chris Saunders
Source:
Soil & tillage research 2014 v.144 pp. 220-227
ISSN:
0167-1987
Subject:
angle of repose; cohesion; furrows; geometry; models; particle size; plastics; prediction; soil; spring
Abstract:
... Discrete element modelling (DEM) is a numerical method for examining the dynamic behaviour of granular media. To enable an accurate DEM simulation to be run appropriate determination of the DEM parameters is essential. Ucgul et al. (2014) proposed using a hysteretic spring (linear plastic) contact model and a method of an angle of repose test and penetration tests using a disc and cone to determin ...
DOI:
10.1016/j.still.2013.10.003

2. Air and Moisture Transport Properties of Low‐Oil DDGS

Author:
Rumela Bhadra; R. P. Kingsly Ambrose; Mark E. Casada; Senay Simsek; Kaliramesh Siliveru
Source:
Cereal chemistry 2017 v.94 no.6 pp. 934-941
ISSN:
0009-0352
Subject:
air; amino acids; angle of repose; cattle; color; corn; diffusivity; distillers grains; equilibrium moisture content; ethanol; heat; nonlinear models; nutrients; oils; particle size; permeability; porosity; prediction; relative humidity; swine; temperature; United States
Abstract:
... Distillers dried grains with solubles (DDGS) are widely used as feed for cattle, dairy, and swine because of their protein, fiber, amino acids, fat, and other vital nutrients. Corn ethanol plants in the United States recently have started extracting oil from DDGS to gain additional profit, thus producing low‐oil DDGS. So far, there has been no comprehensive study reported with bulk handling and fl ...
DOI:
10.1094/CCHEM-03-17-0050-R

3. Albizia procera gum as an excipient for oral controlled release matrix tablet

Author:
Lalduhsanga Pachuau; Bhaskar Mazumder
Source:
Carbohydrate polymers 2012 v.90 no.1 pp. 289-295
ISSN:
0144-8617
Subject:
Albizia procera; Fourier transform infrared spectroscopy; acetaminophen; angle of repose; compressibility; differential scanning calorimetry; hardness; methylcellulose; models; viscosity; water content
Abstract:
... The purpose of this research was to develop and evaluate controlled release matrix tablets of paracetamol based on natural gum exudates of Albizia procera. Procera gum was characterized of its properties like compressibility index, angle of repose, viscosity and moisture content. The interaction between the gum and paracetamol was also studied through differential scanning calorimetry (DSC) and FT ...
DOI:
10.1016/j.carbpol.2012.05.038

4. Algorithm for the determination of the angle of repose in bulk material analysis

Author:
Dominik Müller; Eric Fimbinger; Clemens Brand
Source:
Powder technology 2021 v.383 pp. 598-605
ISSN:
0032-5910
Subject:
accuracy; algorithms; angle of repose; automation; behavior; calibration; computer software; cylinders; humans; measurement; paper; reproducibility; testing
Abstract:
... As far as the calibration of bulk material for DEM simulations is concerned, it is necessary to adjust the properties of simulated bulk material until the behaviour of this digitally modelled material coincides with the behaviour of physical material tested in laboratory tests. One well-established parameter that is often used for this purpose is the so-called angle of repose, which can be describ ...
DOI:
10.1016/j.powtec.2021.01.010

5. Analysis of a hybrid packed bed dryer assisted by infrared radiation for processing acerola (Malpighia emarginata D.C.) residue

Author:
Geraldo D.R. Nogueira; Priscila B. Silva; Claudio R. Duarte; Marcos A.S. Barrozo
Source:
Food and bioproducts processing 2019 pp. -
ISSN:
0960-3085
Subject:
Malpighia emarginata; acerolas; angle of repose; antioxidant activity; ascorbic acid; bioactive compounds; coproducts; drying; equations; flavonoids; high performance liquid chromatography; infrared radiation; phenolic acids; prediction; water content
Abstract:
... Acerola (Malpighia emarginata D.C.) industry generates a large quantity of residues, which are underused or incorrectly disposed. However, acerola residues are rich sources of bioactive compounds. Nevertheless, this fruit waste presents high values of angles of repose, as well as low density and high moisture content. These factors result in poor flowability making it difficult to use moving beds ...
DOI:
10.1016/j.fbp.2019.01.007

6. Analysis of physicochemical and thermo-mechanical characteristics of Iranian black seed (Nigella oxypetala Boiss)

Author:
Seyed Mohammad Taghi Gharibzahedi; Seyed Mohammad Mousavi; Mohammad Jouki; Mohammad Ghahderijani
Source:
International journal of food engineering 2012 v.8 no.3 pp. -
ISSN:
1556-3758
Subject:
Nigella; aluminum; angle of repose; bulk density; chemical analysis; energy; engineering; fatty acid composition; friction; mineral content; nutritive value; plywood; porosity; processing equipment; seeds; specific heat; steel; thermal conductivity; thermal diffusivity; water content
Abstract:
... The study experimentally scrutinized nutritional and engineering properties of Iranian black seed at a moisture content of 5.1% (w.b.) in order to design processing equipment and machinery for various post-harvest operations. Analysis of chemical composition, mineral content and fatty acid profile illustrated that the seeds had high nutritional value. Bulk density, true density and porosity were 5 ...
DOI:
10.1515/1556-3758.2703

7. Analysis of the compressibility of edible powders under low pressure

Author:
Changpu Shen; Yongxiang Li; Xuemeng Xu
Source:
Journal of food engineering 2022 v.316 pp. 110828
ISSN:
0260-8774
Subject:
angle of repose; compressibility; friction; particle size distribution; water content; wheat flour; wheat starch
Abstract:
... Appropriate compression of edible powder is very beneficial to the powder itself and the industrial production, but the law and mechanism of the influence of various factors on the compressibility of powder are not clear. Therefore, this study was used uniaxial confined real compression experiments to separately study the influence law of particle size distribution, moisture content and static fri ...
DOI:
10.1016/j.jfoodeng.2021.110828

8. Angle of repose of landslide debris deposits induced by 2008 Sichuan Earthquake

Author:
Jun-Jie Wang; Di Zhao; Yue Liang; Hui-Bo Wen
Source:
Engineering geology 2013 v.156 no. pp. 103-110
ISSN:
0013-7952
Subject:
angle of repose; earthquakes; engineering; landslides; particle size; rivers; China
Abstract:
... The angle of repose is defined to be the angle made by the heap of the granular deposited materials in the slope or the run-out of the deposits. Present study focuses on the angle of repose of landslide debris deposits induced by the 2008 Sichuan Earthquake in China. The angle of repose was measured in the field and tested in laboratory, respectively. The angles of repose of 87 landslide debris de ...
DOI:
10.1016/j.enggeo.2013.01.021

9. Application of CPFD method in the simulation of vertical dense phase pneumatic conveying of pulverized coal

Author:
Yong Jin; Haifeng Lu; Xiaolei Guo; Xin Gong
Source:
Powder technology 2019 v.357 pp. 343-351
ISSN:
0032-5910
Subject:
angle of repose; capacitance; cohesion; equations; models; momentum; powders; pulverized coal; tomography
Abstract:
... Flow stability is a key issue to be addressed by the development of dense phase pneumatic conveying. Flow patterns are closely related to flow stability. From the view of experimental materials, angle of repose, packing density and tapped density and flowability results show that the tested pulverized coal approximated a Geldart's group C powder with strong cohesion. This study contributes with a ...
DOI:
10.1016/j.powtec.2019.08.102

10. Application of microbially induced calcite precipitation in erosion mitigation and stabilisation of sandy soil foreshore slopes: A preliminary investigation

Author:
Emmanuel Salifu; Erica MacLachlan; Kannan R. Iyer; Charles W. Knapp; Alessandro Tarantino
Source:
Engineering geology 2016 v.201 pp. 96-105
ISSN:
0013-7952
Subject:
Sporosarcina pasteurii; angle of repose; calcite; calcium chloride; ecology; engineering; estuaries; floodplains; saline water; sand; sandy soils; shorelines; tides; topographic slope; urea
Abstract:
... Eroding foreshores endanger the floodplains of many estuaries, as such, effective and environmentally friendly interventions are sought to stabilise slopes and mitigate erosion. As a step in forestalling these losses, we developed laboratory microcosms to simulate tidal cycles and examined the mechanisms of erosion and failure on sandy foreshore slopes. As an experimental aim, we applied microbial ...
DOI:
10.1016/j.enggeo.2015.12.027

11. Application of quality by design for optimization of spray drying process used in drying of Risperidone nanosuspension

Author:
Anu Nair; Dignesh Khunt; Manju Misra
Source:
Powder technology 2019 v.342 pp. 156-165
ISSN:
0032-5910
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; angle of repose; atomic force microscopy; bulk density; compressibility; crystal structure; hardness; particle size; powders; solubility; spray drying; temperature
Abstract:
... The objective of present study was to optimize spray drying of Risperidone (RIS) nanosuspension for achieving lower particle size, higher yield and good compressibility of spray dried powder using Quality by design approach. RIS nanosuspension was prepared by anti-solvent precipitation technique using poloxamer 68 and Poloxamer 127 as stabilizers.3 level 2 factorial design was applied using two in ...
DOI:
10.1016/j.powtec.2018.09.096

12. Application uniformity assessment of deep fertilizer placement machine for urea briquettes

Author:
Swapnil Choudhary; Mukesh Jain; Vijaya Rani; Naresh
Source:
Agricultural engineering today 2021 v.45 no.4 pp. 29-36
ISSN:
2230-7265
Subject:
angle of repose; bulk density; calibration; energy use and consumption; fertilizer rates; fertilizers; field capacity; friction; socioeconomic factors; standard deviation; urea
Abstract:
... Deep placement of fertilizer has not only a positive agronomic and socioeconomic impact, but also an environmental benefit. A Deep Fertilizer Placement Machine was evaluated for uniformity of fertilizer application at different level of urea briquette in fertilizer box. Various physical and engineering properties of urea briquette viz. size, shape, bulk density, briquette weight, angle of repose a ...
DOI:
10.52151/aet2021454.1545

13. Artificial Neural Network Modeling of Distillers Dried Grains with Solubles (DDGS) Flowability with Varying Process and Storage Parameters

Author:
Bhadra, Rumela; Muthukumarappan, K.; Rosentrater, Kurt A.
Source:
Cereal chemistry 2011 v.88 no.5 pp. 480-489
ISSN:
0009-0352
Subject:
angle of repose; bulk density; cooling; distillers grains; drying; least squares; neural networks; storage conditions; temperature
Abstract:
... Neural network (NN) modeling techniques were used to predict flowability behavior of distillers dried grains with solubles (DDGS) prepared with varying levels of condensed distillers solubles (10, 15, and 20%, wb), drying temperatures (100, 200, and 300°C), cooling temperatures (-12, 25, and 35°C), and storage times (0 and 1 month). Response variables were selected based on our previous research r ...
DOI:
10.1094/CCHEM-12-10-0179

14. Assessment of Physical and Chemical Aspects of New Persian Walnut Cultivars to Optimize Process Conditions

Author:
Seyed Mohammad Taghi Gharibzahedi; Seyed Mohammad Mousavi; Mohammad Ghahderijani; Ahmad Dadashpour
Source:
International journal of food engineering 2012 v.8 no.1 pp. -
ISSN:
1556-3758
Subject:
amino acid composition; amino acids; angle of repose; correlation; cultivars; dietary fiber; friction; linoleic acid; magnesium; nuts; palmitic acid; physicochemical properties; porosity; potassium; seeds; surface area; Iran
Abstract:
... This paper describes comparative analysis some of physical and chemical properties of novel Persian walnut cultivars (cv. Urmia and Toyserkan) grown in Iran. The physical properties in terms of linear dimensions, geometric mean diameter, mass, volume, sphericity, surface area, true and bulk densities, porosity, repose angle, shell ratio and static coefficient of friction of nuts and kernels of the ...
DOI:
10.1515/1556-3758.2168

15. Assessment of angle of repose of granular plant material using computer image analysis

Author:
Frączek, J.; Złobecki, A.; Zemanek, J.
Source:
Journal of food engineering 2007 v.83 no.1 pp. 17-22
ISSN:
0260-8774
Subject:
cultivars; Zea mays; image analysis; automatic detection; postharvest treatment; food storage; corn; computer analysis; particle size; water content; friction; angle of repose
Abstract:
... The work presents a potential application of computer image analysis for assessment of the natural angle of repose of granular materials. The tests were conducted on 4 corn cultivar varieties for five levels of grain moisture within the moisture range 7-35%. It was found that computer analysis applied to determine the angle of repose significantly improved measurement precision. The results of res ...
DOI:
10.1016/j.jfoodeng.2006.11.028

16. Assessment of gravelly soil redistribution caused by a two-tooth harrow in mountainous landscapes of the Yunnan-Guizhou Plateau, China

Author:
L.Z. Jia; J.H. Zhang; Z.H. Zhang; Y. Wang
Source:
Soil & tillage research 2017 v.168 pp. 11-19
ISSN:
0167-1987
Subject:
angle of repose; energy conservation; equations; farmers; gravelly soils; harrows; hoeing; landscapes; plateaus; tillage erosion; China
Abstract:
... The processes of soil redistribution caused by hoeing tillage in hilly areas have been increasingly recognized for nearly two decades. Yet, few studies have examined the effects of hoeing tillage on soil redistribution in rocky mountainous areas. Due to a high rock fragments content of gravelly soils, a special type of hoe called the two-tooth harrow has been widely used in the Yunnan-Guizhou Plat ...
DOI:
10.1016/j.still.2016.12.010

17. Automated measurement of sand dune migration using multi-temporal lidar data and GIS

Author:
Pinliang Dong
Source:
International journal of remote sensing 2015 v.36 no.21 pp. 5426-5447
ISSN:
1366-5901
Subject:
angle of repose; data collection; digital elevation models; dune sand; dunes; geographic information systems; lidar; raster data; remote sensing; statistics; wind direction; New Mexico
Abstract:
... Remote sensing has been used for coastal and desert sand dune studies over the past four decades, yet few methods have been developed for automated detection and measurement of dune migration directions and migration rates in large dune fields. Using high-resolution, high-accuracy, and multi-temporal light detection and ranging (lidar) data acquired in the White Sands Dune Field in New Mexico (USA ...
DOI:
10.1080/01431161.2015.1093192

18. Automated measurement of the numerical angle of repose (aMAoR) of biomass particles in EDEM with a novel algorithm

Author:
Yuan Tan; Yue Yu; Johannes Fottner; Stephan Kessler
Source:
Powder technology 2021 v.388 pp. 462-473
ISSN:
0032-5910
Subject:
algorithms; angle of repose; automation; biomass; calibration; user interface
Abstract:
... The reliable particle parameters of biomass for discrete element method (DEM) pose a challenge in reproducing actual conditions in a simulation environment. However, the calibration of simulation parameters was not seriously considered in industrial or academic fields. In order to adjust the main material parameters and contact parameters of biomass materials in DEM simulation, a calibration proce ...
DOI:
10.1016/j.powtec.2021.04.062

19. Basal shear stress of debris flow in the runout phase

Author:
V. D'Agostino; F. Bettella; M. Cesca
Source:
Geomorphology 2013 v.201 no. pp. 272-280
ISSN:
0169-555X
Subject:
angle of repose; energy balance; equations; friction; mixtures; rheology; sediments; shear stress; watersheds; Italy
Abstract:
... A laboratory device is proposed to assess the basal shear stresses generated by debris-flow mixtures during their runout phase. The device consists of an inclinable box with a gate facing a deposition plane. The box is filled with a selected debris-flow mixture, and after sudden opening of the gate, the features of the dam-break deposit can be measured. Based on some simplified assumptions of the ...
DOI:
10.1016/j.geomorph.2013.07.001

20. Bedform development in mixed sand–mud: The contrasting role of cohesive forces in flow and bed

Author:
Jaco H. Baas; Alan G. Davies; Jonathan Malarkey
Source:
Geomorphology 2013 v.182 no. pp. 19-32
ISSN:
0169-555X
Subject:
angle of repose; clay; cohesion; forces; mixtures; models; prediction; sand; sediment transport; silt; topography; turbulent flow; velocity; wavelengths
Abstract:
... The majority of subaqueous sediment on Earth consists of mixtures of cohesive clay and cohesionless sand and silt, but the role of cohesion on the development and stability of sedimentary bedforms is poorly understood. The results of new laboratory flume experiments on bedform development in cohesive, mixed sand–mud beds are compared with the results of previous experiments in which cohesive force ...
DOI:
10.1016/j.geomorph.2012.10.025

21. Beyond the angle of repose: A review and synthesis of landslide processes in response to rapid uplift, Eel River, Northern California

Author:
Joshua J. Roering; Benjamin H. Mackey; Alexander L. Handwerger; Adam M. Booth; David A. Schmidt; Georgina L. Bennett; Corina Cerovski-Darriau
Source:
Geomorphology 2015 v.236 pp. 109-131
ISSN:
0169-555X
Subject:
aerial photography; angle of repose; autumn; bedrock; drainage; interferometry; landscapes; landslides; lidar; models; mountains; radiative forcing; radionuclides; rain; remote sensing; rivers; satellites; seasonal variation; sediment transport; sediments; shrubs; spring; streams; summer; topographic slope; trees; watersheds; winter; California
Abstract:
... In mountainous settings, increases in rock uplift are often followed by a commensurate uptick in denudation as rivers incise and steepen hillslopes, making them increasingly prone to landsliding as slope angles approach a limiting value. For decades, the threshold slope model has been invoked to account for landslide-driven increases in sediment flux that limit topographic relief, but the manner b ...
DOI:
10.1016/j.geomorph.2015.02.013

22. Biomass feeding in a dilute pneumatic conveying system

Author:
Thais L.C. Gomes; Giovani A. Lourenço; Carlos H. Ataíde; Claudio R. Duarte
Source:
Powder technology 2021 v.391 pp. 321-333
ISSN:
0032-5910
Subject:
air; angle of repose; biomass; bulk density; corn; corn cobs; corn straw; equations; renewable energy sources; rice hulls; silos; technology; water content; wheat bran
Abstract:
... Biomass is a renewable energy source of increasing industrial interest. However, due to particle physical characteristics, operational problems are verified during its transport, which is usually associated with the control of the feeding process. In this context, a feeding system was designed, specifically for the control of biomass flow rate, in a positive pressure pneumatic conveying line, whic ...
DOI:
10.1016/j.powtec.2021.06.020

23. Bulk densities and flowability of mono-sized, binary mixtures and particle size distributions of glass spheres

Author:
Haim Kalman
Source:
Powder technology 2022 v.397 pp. 117086
ISSN:
0032-5910
Subject:
angle of repose; equations; glass; particle size; particle size distribution; technology
Abstract:
... The angle of repose, angle of tilting, and Hausner ratio are frequently used to estimate the flowability of a particulate material. Also, the free and tapped densities are commonly used for design and operating of particulate solids handling systems. In this study, these properties were determined for mono-sized, binary mixtures and particle size distributions of spherical glass. It was found, as ...
DOI:
10.1016/j.powtec.2021.117086

24. Bulk densities and flowability of non-spherical particles with mono-sized and particle size distributions

Author:
Haim Kalman
Source:
Powder technology 2022 v.401 pp. 117305
ISSN:
0032-5910
Subject:
angle of repose; particle size; technology
Abstract:
... The angle of repose, angle of tilting, and Hausner ratio are frequently used to estimate the flowability of particulate materials. In addition, free and tapped densities are commonly used for the design and operation of systems for handling particulate solids. In this study, these properties were determined for mono-sized and particle size distributions of three non-spherical particle materials. B ...
DOI:
10.1016/j.powtec.2022.117305

25. Bulk flow properties of model food powder at different water activity

Author:
Chang, K.S.; Kim, D.W.; Kim, S.S.; Jung, M.Y.
Source:
International journal of food properties 1998 v.1 no.1 pp. 45-55
ISSN:
1094-2912
Subject:
mathematical models; foods; equations; potato starch; flow; cohesion; bulk density; wheat protein; powders; protein content; water activity; angle of repose; prediction
DOI:
10.1080/10942919809524564

26. Burden circumferential mass segregation at the blast furnace with parallel hoppers

Author:
Jiansheng Chen; Haibin Zuo; Hongbo Zhao; Qingguo Xue; Jingsong Wang
Source:
Powder technology 2022 v.409 pp. 117845
ISSN:
0032-5910
Subject:
angle of repose; friction; furnaces; mass flow; models
Abstract:
... Burden circumferential mass segregation has a negative influence on the smooth operation of blast furnace. A three-dimensional model of charging system of blast furnace with parallel hoppers based on the discrete element method (DEM) was established to investigate the effects of Y-tube diameter and mass flow rate on the segregation. The static and rolling friction coefficients of sinter and pellet ...
DOI:
10.1016/j.powtec.2022.117845

27. Calibration and Experimental Validation of Contact Parameters for Oat Seeds for Discrete Element Method Simulations

Author:
Lingxin Geng; Jiewen Zuo; Fuyun Lu; Xin Jin; Chenglong Sun; Jiangtao Ji
Source:
Applied engineering in agriculture v.37 no.4 pp. 605-614
ISSN:
0883-8542
Subject:
agriculture; angle of repose; calibration; crops; equations; friction; oats; polymethylmethacrylate
Abstract:
... Highlights The static friction coefficient and rolling friction coefficient of oat seeds were calibrated by the discrete element method. Two representative oat varieties were selected. The hollow cylinder method and sidewall collapse method were used together to reduce the test error. Abstract . Hulless and shelled oat are two types of oat with major differences in physical appearance. To study th ...
Handle:
10113/7506372
DOI:
10.13031/aea.14381

28. Calibration and Tests for the Discrete Element Simulation Parameters of Fallen Jujube Fruit

Author:
Gaokun Shi; Jingbin Li; Longpeng Ding; Zhiyuan Zhang; Huizhe Ding; Ning Li; Za Kan
Source:
Agriculture (Basel) 2021 v.12 no.1 pp. -
ISSN:
2077-0472
Subject:
Ziziphus; agriculture; angle of repose; computer software; equipment; friction; fruits; simulation models; steel
Abstract:
... Discrete element method (DEM) simulation is an important method to analyze the interaction relationship between materials and equipment, and to develop machinery and/or equipment. However, it is necessary to input specific simulation parameters when establishing a DEM simulation model. In this study, the interval values were measured through angle of repose tests of fallen jujube fruit (FJF), and ...
DOI:
10.3390/agriculture12010038

29. Calibration and Validation of a Discrete Element Model of Corn Using Grain Flow Simulation in a Commercial Screw Grain Auger

Author:
Mohammad Mousaviraad; Mehari Z. Tekeste; Kurt A. Rosentrater
Source:
Transactions of the ASABE v.60 no.4 pp. 1403-1415
ISSN:
2151-0032
Subject:
agricultural industry; angle of repose; corn; mass flow; models; prediction; thermodynamics
Abstract:
... Screw augers are primary grain conveying equipment in the agriculture industry. Quantitative prediction of grain conveyance using screw augers requires better understanding and measurement of bulk particle-particle and particle-rigid-body interactions. Discrete element modeling (DEM) has potential to simulate particle dynamics and flow within a screw auger and thus provide simulation-based guidanc ...
DOI:
10.13031/trans.12200

30. Calibration and interpretation of DEM parameters for simulations of cylindrical tablets with multi-sphere approach

Author:
Ramon Cabiscol; Jan Henrik Finke; Arno Kwade
Source:
Powder technology 2018 v.327 pp. 232-245
ISSN:
0032-5910
Subject:
angle of repose; coatings; friction; industry; mathematical models; modulus of elasticity; powders; product quality; rolling
Abstract:
... Finishing and transport operations of pharmaceutical tablets such as coating and conveying processes can qualitatively be improved with a better understanding of the interplay of process parameters and product quality attributes. This study provides a first step towards the simulation of these processes with the calibration of the motion modelling of uniaxial-compressed cylindrical tablets using t ...
DOI:
10.1016/j.powtec.2017.12.041

31. Calibration of DEM models for irregular particles based on experimental design method and bulk experiments

Author:
Haili Zhou; Zhanqi Hu; Jigang Chen; Xuan Lv; Nan Xie
Source:
Powder technology 2018 v.332 pp. 210-223
ISSN:
0032-5910
Subject:
Poisson distribution; algorithms; angle of repose; bulk density; calibration; computer software; experimental design; graphene; models; powders
Abstract:
... Discrete element method (DEM) is widely used in particle modeling and related applications. DEM modeling requires a large number of micro particle parameters, which are difficult to measure for irregular particles, thus the parameter calibration method is introduced. This paper presents a new DEM parameter calibration method: taking the angle of repose and bulk density of expanded graphite (EG) pa ...
DOI:
10.1016/j.powtec.2018.03.064

32. Calibration of parameters for DEM simulations of solar particle receivers by bulk experiments and surrogate functions

Author:
Johannes Grobbel; Stefan Brendelberger; Matthias Henninger; Christian Sattler; Robert Pitz-Paal
Source:
Powder technology 2020 v.364 pp. 831-844
ISSN:
0032-5910
Subject:
angle of repose; bauxite; friction; heat transfer; hydraulic fracturing; industry; models; power plants; rolling; solar thermal energy
Abstract:
... Bauxite particles known as proppants from the fracking industry are an emerging heat transfer medium for solar thermal power plants. The discrete element method (DEM) has just recently been applied to these systems and the information on parameters for contact force models is scarce; calibrated parameters cannot be found. In this work a novel, three-stage calibration approach based on multiple bul ...
DOI:
10.1016/j.powtec.2019.11.028

33. Calibration of the discrete element method and the effect of particle shape

Author:
C.J. Coetzee
Source:
Powder technology 2016 v.297 pp. 50-70
ISSN:
0032-5910
Subject:
angle of repose; friction; models; powders; prediction
Abstract:
... The discrete element method (DEM) is used across a wide range of applications. However, accurate predictions can only be made if the input parameters are carefully selected. In this paper a calibration process is proposed to calibrate the parameter values for crushed rock particles up to 40 mm in size. A large shear box with a diameter of 590 mm was designed and built for this purpose. Confined co ...
DOI:
10.1016/j.powtec.2016.04.003

34. Changes to the physicochemical characteristics of wheat straw by mechanical ultrafine grinding

Author:
Yang Yang; Guanya Ji; Weihua Xiao; Lujia Han
Source:
Cellulose 2014 v.21 no.5 pp. 3257-3268
ISSN:
0969-0239
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; angle of repose; bulk density; cadmium; cellulose; crystal structure; grinding; hemicellulose; lead; microstructure; particle size; powders; scanning electron microscopy; thermal stability; thermogravimetry; vibration; water holding capacity; wheat straw
Abstract:
... To investigate changes on the physicochemical characteristics of wheat straw by mechanical ultrafine grinding, wheat straw powders of four different particle sizes and distributions were produced using a sieve-based Retsch ZM100 grind mill and CJM-SY-B ultrafine vibration grind mill. Changes on the microstructure and physicochemical characteristics of the different powders were assessed by scannin ...
DOI:
10.1007/s10570-014-0381-5

35. Characterisation of Madhuca longifolia seed in relation to processing and design of equipment

Author:
C. Shashikumar; R.C. Pradhan; S. Mishra
Source:
Quality assurance and safety of crops & foods 2018 v.10 no.3 pp. 215-221
ISSN:
1757-837X
Subject:
Madhuca longifolia; angle of repose; ash content; bulk density; carbohydrates; deformation; energy; energy requirements; equipment design; flowers; foods; fruits; hardness; mechanical properties; oils; physicochemical properties; porosity; processing equipment; protein content; quality control; seeds; surface area; water content
Abstract:
... Madhuca longifolia, commonly known as mahua, is an important crop due to its industrial uses and applications of its flower, fruit and seed. The characterisation of mahua seeds is essential for its further processing as well as for the design of post-harvest equipment. Therefore, the aim of the study was to characterise the mahua seed in terms of its physical, mechanical and chemical properties. T ...
DOI:
10.3920/QAS2017.1075

36. Characterisation of Properties for Karanj (Pongamia pinnata) Seeds and Kernels in Relation to Bulk Handling and Processing Applications

Author:
Subir Kumar Chakraborty; Narendra Singh Chandel; Nachiket Kotwaliwale; R. H. Sadvatha; Vinayak Dattatray Fasake; Sasanka Sekhar Mishra; Thutturu Sravan
Source:
Agricultural research 2018 v.7 no.3 pp. 280-289
ISSN:
2249-720X
Subject:
Millettia pinnata; angle of repose; color; deformation; energy; engineering; friction; hardness; linear models; mechanical properties; oils; physicochemical properties; porosity; protein content; seeds; surface area
Abstract:
... The present study was undertaken to investigate engineering properties (viz. mass, density, volume, porosity, surface area, specific surface area, coefficient of friction, angle of repose, mechanical properties and colour) and chemical characteristics (moisture, oil and protein content) of Karanj (Pongamia pinnata) seeds and kernels. The length (l), width (w) and thickness (t) values indicated tha ...
DOI:
10.1007/s40003-018-0319-5

37. Characteristics and composition of Albizia procera (Roxb.) Benth gum

Author:
Lalduhsanga Pachuau; H. Lalhlenmawia; Bhaskar Mazumder
Source:
Industrial crops and products 2012 v.40 no. pp. 90-95
ISSN:
0926-6690
Subject:
Albizia procera; Fourier transform infrared spectroscopy; acid hydrolysis; angle of repose; anion exchange; arabinose; color; electrodes; galactose; gold; physicochemical properties; protein content; rheology; scanning electron microscopy; viscometers
Abstract:
... The monosaccharide composition and physicochemical properties of Albizia procera gum was investigated. The crude exudate gum was reddish brown in color yielding a clear solution in water. The flow property of powdered and dried gum was established through Carr's index and angle of repose. It was observed that the gum possesses a fairly good flow property. Total carbohydrates, ash, protein and mois ...
DOI:
10.1016/j.indcrop.2012.03.003

38. Characteristics of Microcrystalline Cellulose from Coir Fibers

Author:
Joyline Gichuki; Patrick Gachoki Kareru; Anthony Ngure Gachanja; Catherine Ngamau
Source:
Journal of natural fibers 2022 v.19 no.3 pp. 915-930
ISSN:
1544-046X
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; angle of repose; bulk density; cellulose; coir; compressibility; crystal structure; glass transition; hemicellulose; lignin; paper; peracetic acid; sodium hydroxide; temperature; thermogravimetry
Abstract:
... This work aimed to extract and characterize microcrystalline cellulose from coir fibers. Extraction was achieved in a two-step process in which the coir fibers were treated with sodium hydroxide for 3 h at 100°C followed by bleaching with peracetic acid to remove residual lignin and hemicellulose. The microcrystalline cellulose powder characteristics such as the bulk density, tapped density, angle ...
DOI:
10.1080/15440478.2020.1764441

39. Characterization of Hazelnut Milk Powders: A Comparison of Spray-Drying and Freeze-Drying

Author:
Ertan Ermis; Kübra Özkan Güner; Mustafa Tahsin Yilmaz
Source:
International journal of food engineering 2018 v.14 no.11-12 pp. -
ISSN:
1556-3758
Subject:
Fourier transform infrared spectroscopy; absorbance; angle of repose; dried milk; endothermy; freeze drying; freezing; hazelnut milk; maltodextrins; powders; solubility; spray drying; temperature; thermal properties; water activity; water content; zeta potential
Abstract:
... Production of hazelnut milk powder (HMP) was investigated using maltodextrin (MD) as supporting material. Spray-drying and freeze-drying techniques were used to obtain the powder material. MD was added at concentrations of 5%, 10% and 15% (w/w) prior to drying. The powder properties were evaluated by determining flowing properties (Hausner ratio and angle of repose), thermal behaviour using DSC, m ...
DOI:
10.1515/ijfe-2018-0085

40. Characterization of barley grains in different levels of pearling process

Author:
M.P. Felizardo; J.T. Freire
Source:
Journal of food engineering 2018 v.232 pp. 29-35
ISSN:
0260-8774
Subject:
angle of repose; barley; hulling; human nutrition; permeability; porosity
Abstract:
... It has been shown recently that addition of barley grains to human nutrition translates into many benefits to the health. Therefore the purpose of this paper was to characterize the barley grains through the pearling process. The barley grains were dehulled on the rotatory drum with abrasive wall. The measured properties evaluated the physical, flow and fluid dynamic characteristics of barley grai ...
DOI:
10.1016/j.jfoodeng.2018.03.017

41. Characterization of engineering properties and modeling mass and fruit fraction of wood apple (Limonia acidissima) fruit for post-harvest processing

Author:
Sahithi Murakonda; Gopesh Patel; Madhuresh Dwivedi
Source:
Journal of the Saudi Society of Agricultural Sciences 2022 v.21 no.4 pp. 267-277
ISSN:
1658-077X
Subject:
Limonia acidissima; angle of repose; apples; calorimeters; commercialization; friction; fruit weight; fruits; glass transition temperature; models; product development; pulp; regression analysis; steel; therapeutics; value added
Abstract:
... The wood apple (Limonia acidissima) fruit is an underutilized fruit having extensive therapeutic and functional properties. The engineering properties (physical, frictional, thermal, textural, and mechanical) of the wood apple fruit aids in the assessment of the internal and external structure of the fruit. The mean principle dimensions of fruit are 7.79 cm, 7.60 cm, and 7.44 cm for longest dimens ...
DOI:
10.1016/j.jssas.2021.09.005

42. Characterization of granular phase change materials for thermal energy storage applications in fluidized beds

Author:
M.A. Izquierdo-Barrientos; C. Sobrino; J.A. Almendros-Ibáñez; C. Barreneche; N. Ellis; L.F. Cabeza
Source:
Applied energy 2016 v.181 pp. 310-321
ISSN:
0306-2619
Subject:
angle of repose; differential scanning calorimetry; energy; fluidized beds; hydrodynamics; particle size; particle size distribution; phase transition; scanning electron microscopes; scanning electron microscopy; temperature
Abstract:
... This work investigates commercially available granular phase change materials (PCMs) with different transition temperatures for the use of thermal-energy storage systems in fluidized beds. The hydrodynamic characteristics of granular PCMs were tested in cylindrical-3D and planar-2D fluidized beds. The density, particle size distribution and angle of repose were measured for various PCM materials. ...
DOI:
10.1016/j.apenergy.2016.08.081

43. Characterization of okra seeds of promising genotypes on the basis of physical properties

Author:
K. Prasad; R.K. Sharma
Source:
Indian journal of agricultural research 2012 v.46 no.3 pp. 199-207
ISSN:
0976-058X
Subject:
agricultural research; angle of repose; cultivars; friction; genotype; image analysis; okra; porosity; water content
Abstract:
... Seeds of nineteen selected genetically diverse okra strains were evaluated for physical characteristics. Properties of materials play crux role in the development of any processing and handling equipments. Through present study efforts were made to find out variability and relationship between seeds of various economically important traits of okra. The seeds of okra cultivars having moisture conte ...

44. Characterization of particle shape of nickel-based superalloy powders using image processing techniques

Author:
Li-Chong Zhang; Wen-Yong Xu; Zhou Li; Liang Zheng; Yu-Feng Liu; Guo-Qing Zhang
Source:
Powder technology 2022 v.395 pp. 787-801
ISSN:
0032-5910
Subject:
algorithms; angle of repose; atomization; probability distribution; quality control; satellites; superalloys
Abstract:
... In order to achieve quality control of nickel-based superalloy powders, it is necessary to quantitatively characterize the particle shape. This paper introduces how the image processing techniques were used to quantitatively evaluate the particle shape and its distribution. Firstly, the appropriate edge extraction operator was determined by multiple comparisons of processing effect of six edge ext ...
DOI:
10.1016/j.powtec.2021.10.013

45. Characterization of stipe and cap powders of mushroom (Lentinus edodes) prepared by different grinding methods

Author:
Zipei Zhang; Huige Song; Zhen Peng; Qingnan Luo; Jian Ming; Guahua Zhao
Source:
Journal of food engineering 2012 v.109 no.3 pp. 406-413
ISSN:
0260-8774
Subject:
Lentinula edodes; angle of repose; bulk density; dietary protein; grinding; milling; mushrooms; nutritive value; particle size; particle size distribution; physicochemical properties; powders; soluble fiber; surface area
Abstract:
... The effects of micronization methods, mechanical and jet millings, on the physico-chemical properties of mushroom (Lentinus edodes) powder were investigated in contrast to shear pulverization. The powders of dried mushroom cap and stipe were prepared to obtain six powders. Compared to shear pulverization, mechanical and jet millings effectively reduced particle size and brought about a narrow and ...
DOI:
10.1016/j.jfoodeng.2011.11.007

46. Characterization of the flowability of fly ashes from grate-fired combustion of forest residues

Author:
Christof Lanzerstorfer
Source:
Fuel processing technology 2016 v.150 pp. 10-15
ISSN:
0378-3820
Subject:
angle of repose; bulk density; collectors; combustion; fly ash; friction; particle size; particle size distribution; plant residues; silos
Abstract:
... Data about the flowability of fly ashes are important for the design of hoppers of fly ash collection equipment and fly ash storage silos. Fly ashes from sixteen grate-fired combustion plants (first-stage and second-stage de-dusting fly ash) were examined for flow relevant properties. The flowability category of the coarser first-stage fly ashes was cohesive to easy-flowing, while for the second-s ...
DOI:
10.1016/j.fuproc.2016.05.020

47. Characterization of titanium powder: Microscopic views and macroscopic flow

Author:
Nicholas A. Pohlman; John A. Roberts; Matthew J. Gonser
Source:
Powder technology 2012 v.228 no. pp. 141-148
ISSN:
0032-5910
Subject:
angle of repose; cost effectiveness; energy; gravity; image analysis; manufacturing; metallurgy; microstructure; particle size distribution; powders; quantitative analysis; scanning electron microscopy; titanium
Abstract:
... Powder metallurgy is a very popular and cost effective process due to improvements in powder availability and the ability to produce a part close to the desired net shape. With the introduction of the Armstrong Process®, which produces commercially pure titanium powder, it is necessary to understand the flowability characteristics of the irregular particles produced. This paper reports the physica ...
DOI:
10.1016/j.powtec.2012.05.009

48. Chemical composition and physical properties of filter fly ashes from eight grate-fired biomass combustion plants

Author:
Christof Lanzerstorfer
Source:
Journal of Environmental Sciences 2015 v.30 pp. 191-197
ISSN:
1001-0742
Subject:
angle of repose; biomass; calcium; chemical composition; combustion; dust; fly ash; heavy metals; magnesium; particle size; particle size distribution; phosphates; straw; wood
Abstract:
... For the handling, treatment and utilization of fly ash from biomass combustion its chemical composition and physical properties are important. In this study eight filter fly ashes from different grate-fired biomass combustion plants were investigated. In fly ash from straw combustion high concentrations of (K) were found, whereas in the fly ash from wood combustion the concentrations of Ca and Mg ...
DOI:
10.1016/j.jes.2014.08.021

49. Class-based physical properties of air-classified sunflower seeds and kernels

Author:
Simon Munder; Dimitrios Argyropoulos; Joachim Müller
Source:
Biosystems engineering 2017 v.164 pp. 124-134
ISSN:
1537-5110
Subject:
air; angle of repose; bulk density; friction; lipid content; oleic acid; porosity; postharvest treatment; seed weight; seeds; sunflower seed
Abstract:
... High oleic sunflower seeds, with higher oil content and greater oleic acid content than other sunflower seeds, are gaining in economic importance. However, there are still major gaps in knowledge concerning their post-harvest handling. This study was carried out, to establish a simply implemented method of classifying the seeds via air-separation, which allows rapid and precise assignment of high ...
DOI:
10.1016/j.biosystemseng.2017.10.005

50. Closed-Top Fermentation Tanks for Cucumbers

Author:
Ervin G. Humphries; H. P. Fleming
Source:
Applied engineering in agriculture 1986 v.2 no.1 pp. 45-48
ISSN:
0883-8542
Subject:
agricultural engineering; anaerobic digesters; angle of repose; cucumbers; fermentation; geometry; guidelines; lodging; pickling; tanks
Abstract:
... Advantages of closed-top anaerobic tanks for processing fresh, pickling type cucumbers into brinestock are discussed and physical attributes related to tank geometry and sealing are examined. Dynamic angle of repose measurements indicate tank tops should have slopes greater than 35 deg to facilitate filling. Static angle of repose measurements suggest that cucumbers could lodge at pile angles up t ...
DOI:
10.13031/2013.26707)