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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