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You searched for: Keyword "surface roughness" Remove constraint Keyword: "surface roughness"
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1. Effect of Surface Roughness on Hydrodynamic Characteristics of an Impinging Droplet

Author:
Rajeev Kumar Singh; Peter D. Hodgson; Niladri Sen; Subrat Das
Source:
Langmuir 2021 v.37 no.10 pp. 3038-3048
ISSN:
1520-5827
Subject:
surface roughness,   etc   ; contact angle; droplets; energy; hydrodynamics; hysteresis; roughness;     Show all 7 Subjects
Abstract:
... The influence of surface roughness and impact energy on the hydrodynamic behavior of water droplets impinging upon dry and rigid surfaces of known roughness has been investigated experimentally. The influence of these two parameters on the droplet maximum spreading diameter, slip length during droplet recoil, dynamic contact angle, contact angle hysteresis, and apparent contact angle of droplets ...
DOI:
10.1021/acs.langmuir.0c03193

2. Effects of water tension and surface roughness on soil hyperspectral reflectance

Author:
Markus Koch; Martin C. Schodlok; Georg Guggenberger; Susanne Stadler
Source:
Geoderma 2021 v.385 pp. 114888
ISSN:
0016-7061
Subject:
surface roughness,   etc   ; geometry; quantitative analysis; reflectance; roughness; soil water; texture;     Show all 7 Subjects
Abstract:
... Hyperspectral imaging techniques have been successfully employed to characterize soil chemical and physical parameters. However, such approaches can lack utility due to noise sources such as soil moisture (SM) and soil surface roughness (SSR). Moreover, studies dealing with SSR and SM lack comparability and standardized methods. To quantify these noise sources, reflectance patterns of different ...
DOI:
10.1016/j.geoderma.2020.114888

3. Effects of surface roughness on liquid bridge capillarity and droplet wetting

Author:
Hien Nho Gia Nguyen; Chao-Fa Zhao; Olivier Millet; A.P.S. Selvadurai
Source:
Powder technology 2021 v.378 pp. 487-496
ISSN:
0032-5910
Subject:
surface roughness,   etc   ; abrasives; cameras; capillarity; contact angle; droplets; equations; forces; geometry; glass; image analysis; liquids; measurement; roughness; surfaces; technology; wettability;     Show all 17 Subjects
Abstract:
... This study examines the influence of surface roughness on the capillarity of liquid bridges between two solid surfaces and the wettability of droplets on solid surfaces. For this purpose, different surface roughnesses were prepared by gluing waterproof sandpaper onto flat glass surfaces. The effects of surface roughness on liquid bridge capillarity were investigated by using a method ...
DOI:
10.1016/j.powtec.2020.10.016

4. Quantitative evaluation of surface roughness for granular materials using Gaussian filter method

Author:
Yang Li; Masahide Otsubo; Reiko Kuwano; Sadegh Nadimi
Source:
Powder technology 2021 v.388 pp. 251-260
ISSN:
0032-5910
Subject:
surface roughness,   etc   ; equations; glass; guidelines; particle size; quantitative analysis; regression analysis; roughness; sand; technology; wavelengths;     Show all 11 Subjects
Abstract:
... This contribution proposes a methodology to measure the surface roughness of granular materials using the Gaussian filter. Artificially generated rough surfaces with known root mean square roughness (Sq) combined with the spherical shape are analysed to determine the optimum cut-off wavelength (σ∗) adopted in the Gaussian filter. Considering a combined dependency of Sq and particle size (D) on σ ...
DOI:
10.1016/j.powtec.2021.04.068

5. Mathematical modelling of the surface roughness in orthogonal cutting of the massive wood

Author:
Redžo Hasanagić; Atif Hodžić; Aldin Bjelić
Source:
Wood material science and engineering 2021 v.16 no.2 pp. 74-80
ISSN:
1748-0280
Subject:
surface roughness,   etc   ; Fagus; materials science; mathematical models; roughness; wood; Bosnia-Herzegovina;     Show all 7 Subjects
Abstract:
... from the area of Bosnia and Herzegovina after processing with orthogonal cutting on a four-sided shaper was studied, at different feed speed and cutting depth . The mathematical model of the influence parameters on the treated surface roughness of solid wood was also presented. The paper presented a sample example of how a process can be predicted before it goes into production, avoiding exploitation ...
DOI:
10.1080/17480272.2019.1608297

6. Effect of surface roughness on the collision dynamics of water drops on wood

Author:
Yun-Yu Zhuo; Siam Hussain; Shi-Yow Lin
Source:
Colloids and surfaces 2021 v.612 pp. 125989
ISSN:
0927-7757
Subject:
surface roughness,   etc   ; Diospyros; Handroanthus; energy balance; liquids; roughness; wood;     Show all 7 Subjects
Abstract:
... The impingement of water drops on Diospyros crassiflora and Handroanthus spp. wood substrates, with roughness ranging from 0.50 to 5.7 μm, were investigated. The results indicated that surface roughness controlled (i) the mobility of the liquid film, (ii) the integrity of the impinging drop, and (iii) the energy balance during the drop impact process. More specifically, the decreased mobility ...
DOI:
10.1016/j.colsurfa.2020.125989

7. Surface roughness prediction using a hybrid scheme of difference analysis and adaptive feedback weights

Author:
M.K.O. Ayomoh; K.A. Abou-El-Hossein
Source:
Heliyon 2021 v.7 no.3 pp. e06338
ISSN:
2405-8440
Subject:
surface roughness,   etc   ; computer software; data collection; neural networks; prediction; regression analysis;     Show all 6 Subjects
Abstract:
... This research has presented an optimum model for surface roughness prediction in a shop floor machining operation. The proposed solution is premised on difference analysis enhanced with a feedback control model capable of generating transient adaptive weights until a converging set point is attained. The surface roughness results utilized herein were adopted from two prior experiments ...
DOI:
10.1016/j.heliyon.2021.e06338

8. Surface roughness effects on soil loss rate in complex hillslopes under laboratory conditions

Author:
Ava Mombini; Nosratollah Amanian; Ali Talebi; Mahboobeh Kiani-Harchegani; Jesús Rodrigo-Comino
Source:
Catena 2021 v.206 pp. 105503
ISSN:
0341-8162
Subject:
surface roughness,   etc   ; catenas; geometry; humans; microrelief; oils; rain intensity; rainfall simulation; sediments; soil erosion; topographic slope; watersheds; Iran;     Show all 13 Subjects
Abstract:
... Factors involved in hillslope geometry and soil erosion are still under discussion by the scientific community- and one of these factors is microtopography. In this research, the effect of surface roughness (SR) on the soil loss was investigated for different complex hillslope (CHS) systems in terms of plan shapes (convergent, parallel, and divergent) and profile curvatures (convex, concave ...
DOI:
10.1016/j.catena.2021.105503

9. High-flux sublimation of a 3D carbon/carbon composite: Surface roughness patterns

Author:
Cyril Levet; Jean Lachaud; Virginie Ducamp; Régis Memes; Jacques Couzi; Julien Mathiaud; Adrien P. Gillard; P. Weisbecker; Gérard L. Vignoles
Source:
Carbon 2021 v.173 pp. 817-831
ISSN:
0008-6223
Subject:
surface roughness,   etc   ; carbon; carbon fibers; furnaces; light microscopy; mathematical models; oxidation; roughness; sublimation; temperature; transmission electron microscopy;     Show all 11 Subjects
Abstract:
... 3D carbon-fibre reinforced carbon composites (3D Cf/C) are used as thermal protection systems for atmospheric re-entry, where they are exposed to strong ablation. Particularly, sublimation of the carbonaceous material plays an important role during the re entry. To study this, an arc image furnace under controlled Argon flow is used, with heat fluxes of 8 MWm⁻² to 10 MWm⁻². The furnace and the sam ...
DOI:
10.1016/j.carbon.2020.11.023

10. In-barn measurements of surface roughness and friction of slatted concrete floors in sow gestation rooms

Author:
Xiaojie Yan; Qiang Zhang; Laurie Connor; Nicolas Devillers; Kristopher Dick
Source:
Biosystems engineering 2021 v.205 pp. 137-145
ISSN:
1537-5110
Subject:
surface roughness,   etc   ; claws; friction; pregnancy; roughness; traffic;     Show all 6 Subjects
Abstract:
... Claw injuries of pigs due to inadequate floor surface conditions are a major concern in pig operations. Rough and slippery concrete floor surfaces can result in claw disorders. In this paper, the surface roughness and dynamic coefficient of friction (DCOF) of concrete floors used in two sow gestation rooms were studied. The first room had a slatted concrete floor with 105-mm wide slats and 19-mm ...
DOI:
10.1016/j.biosystemseng.2021.03.001

11. Effect of surface roughness and temperature on stainless steel - Whey protein interfacial interactions under pasteurisation conditions

Author:
Alejandro Ávila-Sierra; Zhenyu Jason Zhang; Peter J. Fryer
Source:
Journal of food engineering 2021 v.301 pp. 110542
ISSN:
0260-8774
Subject:
surface roughness,   etc   ; Gibbs free energy; adhesion; atomic force microscopy; chemical composition; contact angle; hydrophobicity; liquids; modulus of elasticity; pasteurization; stainless steel; surface temperature; wettability; whey protein;     Show all 14 Subjects
Abstract:
... The effects of the surface characteristics of 316L stainless steel (SS316L), including chemical composition before and after foulant deposition, surface roughness, and wall temperature, on both the liquid-solid and the solid-solid interfacial interactions have been investigated using contact angle measurements and atomic force microscopy respectively. Wettability of the metal surface was favoured ...
DOI:
10.1016/j.jfoodeng.2021.110542

12. Evaluating the effect of repeated use of milling burs on surface roughness and adaptation of digitally fabricated ceramic veneers

Author:
Leila Payaminia; Naeime Moslemian; Shima Younespour; Soudabeh Koulivand; Marzieh Alikhasi
Source:
Heliyon 2021 v.7 no.4 pp. e06896
ISSN:
2405-8440
Subject:
surface roughness,   etc   ; cattle; ceramics;     Show all 3 Subjects
Abstract:
... This study aimed to evaluate how repeated use of milling diamond burs with different coarseness affects surface roughness, and marginal and internal adaptation of CAD/CAM veneers.Forty leucite-reinforced glass-ceramic veneers were milled in 2 groups based on the milling mode (with fine or extra-fine bur sets). In each group, every 10 veneers were milled with a new bur set. All veneers were ...
DOI:
10.1016/j.heliyon.2021.e06896

13. Supercritical CO₂ Foam Stabilized by a Viscoelastic Surfactant in Fractured Porous Media: The Effect of Fracture Surface Roughness

Author:
Ying Yu; Soheil Saraji
Source:
Energy & fuels 2021 v.35 no.12 pp. 10051-10061
ISSN:
1520-5029
Subject:
surface roughness,   etc   ; carbon dioxide; energy; foams; oils; petroleum; surfactants; viscoelasticity; viscosity;     Show all 9 Subjects
Abstract:
... such as aperture size, surface roughness, and fracture orientation in natural rocks are not well studied. In this work, we investigated the behavior of scCO₂ foam stabilized by a viscoelastic surfactant in fractured systems. The apparent viscosity of foam in fractured and nonfractured cores was compared. Furthermore, the effects of fracture surface roughness and crude oil on foam behavior were determined. We ...
DOI:
10.1021/acs.energyfuels.1c00281

14. Computational fluid dynamics study of the impact of surface roughness on cyclone performance and erosion

Author:
J. Foroozesh; F. Parvaz; S.H. Hosseini; G. Ahmadi; K. Elsayed; Nihan Uygur Babaoğlu
Source:
Powder technology 2021 v.389 pp. 339-354
ISSN:
0032-5910
Subject:
surface roughness,   etc   ; air flow; bioinformatics; computer software; models; particle size; roughness; turbulent flow;     Show all 8 Subjects
Abstract:
... In this study, the effect of roughness of cyclone wall on the rate of erosion and cyclone performance was studied using the CFD technique with the aid of the Ansys-Fluent 19.2 software. The Reynolds stress transport model was used to simulate the airflow turbulence in the rotating flows in the cyclone. The validated computational model was used, and the variations of axial velocity, tangential vel ...
DOI:
10.1016/j.powtec.2021.05.041

15. Bonding performances of epoxy coatings reinforced by carbon nanotubes (CNTs) on mild steel substrate with different surface roughness

Author:
Dawei Zhang; Ying Huang; Yechun Wang
Source:
Composites 2021 v.147 pp. 106479
ISSN:
1359-835X
Subject:
surface roughness,   etc   ; adhesion; carbon nanotubes; contact angle; epoxides; steel; wettability;     Show all 7 Subjects
Abstract:
... This paper investigated the bonding performances of epoxy coatings reinforced by carbon nanotubes (CNTs) as additives on mild steel substrates. Pure epoxy and CNT-reinforced epoxy coatings on four different surface roughness of steel substrate were tested using single lap shear (SLS) tests. The SLS experimental results indicated that, on rougher substrates, the addition of a small percentage ...
DOI:
10.1016/j.compositesa.2021.106479

16. Assessment of surface roughness and fractional vegetation coverage in the CoLM for modeling regional land surface temperature

Author:
Xiuliang Yuan; Rafiq Hamdi; Friday Uchenna Ochege; Philippe De Maeyer; Alishir Kurban; Xi Chen
Source:
Agricultural and forest meteorology 2021 v.303 pp. 108390
ISSN:
0168-1923
Subject:
surface roughness,   etc   ; common lands; forests; grasslands; latent heat; meteorology; models; roughness length; satellites; shortwave radiation; summer; surface temperature; winter; China;     Show all 14 Subjects
Abstract:
... The application of Land surface models (LSMs) at regional scales still faces challenges and large uncertainties exist in simulating regional energy fluxes and land surface temperature (LST). This is possibly caused by their poor representations of surface parameter properties (e.g., fractional vegetation coverage (FVC) and surface roughness length (z₀ₘ)) to effectively capture vegetation dynamics ...
DOI:
10.1016/j.agrformet.2021.108390

17. Dendrite-free Al recycling via electrodeposition using ionic liquid electrolytes: The effects of deposition temperature and cathode surface roughness

Author:
Yifan Wang; Ramana G. Reddy; Ruigang Wang
Source:
Journal of cleaner production 2021 v.287 pp. 125043
ISSN:
0959-6526
Subject:
surface roughness,   etc   ; X-ray diffraction; abrasives; alloys; aluminum; cathodes; chlorides; density; diffusion; electric potential difference; electrochemistry; electroplating; energy-dispersive X-ray analysis; ionic liquids; ions; mixing; paper; recycling; scanning electron microscopy; temperature;     Show all 20 Subjects
Abstract:
... In this paper, the electrodeposition of Al from aluminum scrap alloys (A2020) on copper cathode substrates with varied surface roughness under different deposition temperatures was studied using low-temperature AlCl₃-1-butyl-3-methyl-imidazolium chloride (BMIC) ionic liquid electrolytes. The bulk electrodeposition of Al was carried out under a voltage of 1.5 V at a stirring rate of 120 rpm using ...
DOI:
10.1016/j.jclepro.2020.125043

18. Surface Roughness of Cu-Bearing Stainless Steel Affects Its Contact-Killing Efficiency by Mediating the Interfacial Interaction with Bacteria

Author:
Xinrui Zhang; Chunguang Yang; Tong Xi; Jinlong Zhao; Ke Yang
Source:
ACS applied materials & interfaces 2021 v.13 no.2 pp. 2303-2315
ISSN:
1944-8252
Subject:
surface roughness,   etc   ; Escherichia coli; adhesion; atomic force microscopy; bacterial adhesion; hydrophobicity; reactive oxygen species; stainless steel; toxicity; viability;     Show all 10 Subjects
Abstract:
... different surface roughnesses of Cu-bearing stainless steel (SS) with the bacterial damage pattern and attempted to clarify the role of surface roughness in mediating the contact-killing behavior of Cu-bearing SS. The results of both atomic force microscopy and scanning electron microscopy investigations showed that E. coli cells experienced the most rapid physical and mechanical damages after incubating ...
DOI:
10.1021/acsami.0c19655

19. Revisiting the supplementary relationship of dynamic contact angles measured by sessile-droplet and captive-bubble methods: Role of surface roughness

Author:
Sreya Sarkar; Tamal Roy; Ankit Roy; Shashwata Moitra; Ranjan Ganguly; Constantine M. Megaridis
Source:
Journal of colloid and interface science 2021 v.581 pp. 690-697
ISSN:
0021-9797
Subject:
surface roughness,   etc   ; bubbles; contact angle; droplets; geometry; hysteresis; prediction; roughness; thermodynamic models; wettability;     Show all 10 Subjects
Abstract:
... of roughness using the sessile-droplet and captive-bubble methods, and interpret the experimental observations using a theoretical model.Findings: The dynamic contact angles measured by the sessile-droplet and captive-bubble methods deviate from the supplementary principle as the surface roughness is increased. We present a theoretical explanation for this disparity and predict the values of the contact ...
DOI:
10.1016/j.jcis.2020.07.098

20. Effect of wood surface roughness on prediction of structural timber properties by infrared spectroscopy using ANFIS, ANN and PLS regression

Author:
Samuel Ayanleye; Vahid Nasir; Stavros Avramidis; Julie Cool
Source:
European journal of wood and wood products 2021 v.79 no.1 pp. 101-115
ISSN:
0018-3768
Subject:
surface roughness,   etc   ; Pseudotsuga menziesii; fuzzy logic; least squares; neural networks; nondestructive methods; prediction; principal component analysis; quality control; wood density;     Show all 10 Subjects
Abstract:
... finish, the effect of wood surface roughness on prediction accuracy of timber properties was also investigated. Accordingly, infrared spectroscopy experiments were carried out on Douglas-fir and Western hemlock specimens having a rough and smooth surface. In addition, the effect of the infrared spectroscopy range on the predictive models was studied. Data in the visible infrared (VIS), near-infrared ...
DOI:
10.1007/s00107-020-01621-x