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Updated: Jun 5, 2026

Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling
Published on: August 5, 2016
Janssen effect and the stability of quasi-two-dimensional sandpiles
Fatemeh Ebrahimi1, Tahereh Azizpour, Hamed Maleki
1Physics Department, University of Birjand, Birjand 97175-615, Iran.
Abstract:
We present the results of three-dimensional discrete element simulations of global normal stresses in quasi-two-dimensional sandpiles formed by pouring monodispersed cohesionless spherical grains into a vertical granular Hele-Shaw cell. We observe the Janssen effect which is the phenomenon of pressure saturation at the bottom of the container. Simulation of cells with different thicknesses shows that the Janssen coefficient κ is a function of the cell thickness. Dependence of global normal stresses as well as κ on the friction coefficients between the grains (μ(p)) and with walls (μ(w)) are also studied. The results show that in the range of our simulations κ usually increases with the wall-grain friction coefficient. Meanwhile by increasing μ(p) while the other system parameters are fixed, we witness a gradual increase in κ to a parameter dependent maximal value.
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