Results 1 to 10 of about 75,265 (198)

Angle of Repose and Angle of Marginal Stability: Molecular Dyanmics of Granular Particles [PDF]

Journal of Physics A: Mathematical and General, 1992
We present an implementation of realistic static friction in molecular dynamics (MD) simulations of granular particles. In our model, to break contacts between two particles, one has to apply a finite amount of force, determined by the Coulomb criterion.
Campbell C S, Clement E, Cundall P A, Devillard P, Dünweg B, Gallas J A C, H J Herrmann, Hong D C, J Lee, Jaeger H M, Laroche C, Liffman K, Pittman E B, Ristow G, Rosato A, Savage S B, Savage S B, Savage S B, Taguchi Y-H, Tildesley D J, Zik O   +20 more
core   +3 more sources

Angle of repose and segregation in cohesive granular matter [PDF]

Physical Review E, 2001
We study the effect of fluids on the angle of repose and the segregation of granular matter poured into a silo. The experiments are conducted in two regimes where: (i) the volume fraction of the fluid is small and it forms liquid bridges between ...
A. Castellanos, A. Kudrolli, A. Mehta, A. Samadani, A. Samadani, Azadeh Samadani, B.J. Persson, D.J. Hornbaker, G. McKinley, G.K. Batchelor, H.A. Makse, H.M. Jaeger, J. Bridgewater and, L. Bocquet, N. Fraysse, O. Pitois, P. Tegzes, R. Albert, R.M. Nedderman, S. Gaudet, S. Savage, T. Boutreax, T.C. Halsey, T.G. Mason, Y. Xu   +24 more
core   +3 more sources

Calibration and test of contact parameters for alfalfa stalk at primary florescence based on discrete element method. [PDF]

PLoS ONE
In view of the lack of accurate models for discrete element simulation in the current research and development process of forage harvesting and crushing machinery, the contact parameters were calibrated based on Hertz-Mindlin (no slip) contact model by ...
Tao Chen, Shujuan Yi, Yifei Li, Guixiang Tao, Xin Mao   +4 more
doaj   +2 more sources

Antlion sand interaction: A study of repose angle

Biogeotechnics
The antlions dig a conical simple pit in sand to catch ants. The funnel shape of the trap is deliberate with a critical angle of repose and is steep and shallow enough to trigger avalanches and cause struggling prey to fall into the funnel.
Ali Maroof
doaj   +2 more sources

Measurement and Calibration of DEM Parameters of Soybean Seed Particles

Agriculture, 2022
In discrete element method (DEM) simulations, accurate simulation parameters are very important. For ellipsoidal soybean seed particles, the rolling friction coefficient between seed particles (RFCP-P) and the rolling friction coefficients between seed ...
Dongxu Yan, Jianqun Yu, Yang Wang, Kai Sun, Long Zhou, Ye Tian, Na Zhang   +6 more
doaj   +1 more source

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

Agriculture, 2021
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.
Gaokun Shi, Jingbin Li, Longpeng Ding, Zhiyuan Zhang, Huizhe Ding, Ning Li, Za Kan   +6 more
doaj   +1 more source

Simultaneous measurement of rice grain friction coefficient and angle of repose using rotating cylinders

Journal of Applied Botany and Food Quality, 2022
Several methods have been developed to measure the friction coefficient of grains and seeds as well as their angle of repose, independently. However, it seems that one single method capable of simultaneous measurement of these two important parameters ...
Jafar Massah, Javad Khazaei
doaj   +1 more source

Calibration of Contact Parameters for Particulate Materials in Residual Film Mixture after Sieving Based on EDEM

Agriculture, 2023
In this study, to obtain the contact parameters of particulate materials accurately and quickly in residual film mixture after sieving, the contact parameters of particulate materials were calibrated via a physical test and simulation test.
Pengfei Zhou, Yaping Li, Rongqing Liang, Bingcheng Zhang, Za Kan   +4 more
doaj   +1 more source

Microscopic Mechanism Angle of Repose in Friable Loess and Its Relationship With Slope Angle

Frontiers in Earth Science, 2022
The angle of repose in soil particles plays a key role in slope stability. There was a need for the investigation on the association between the angle of repose in loess particles and the angle of slopes.
Haoyu Dong, Jiading Wang, Dengfei Zhang, Yuanjun Xu, Zhenxiao Li   +4 more
doaj   +1 more source

Effects of the application system on the physical and mechanical properties of mineral fertilizers [PDF]

Journal on Processing and Energy in Agriculture, 2018
Mineral fertilizers have a pivotal role in contemporary agricultural production, especially when seeking to exploit the full biological potential of crops.
Gavrilović Marija, Dimitrijević Aleksandra, Radojičin Milivoj, Mileusnić Zoran, Miodragović Rajko   +4 more
doaj   +1 more source