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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 8 - CLIMATE CHANGE AND HAZARD MITIGATION : The Dynamic Coefficient for Collisional Granular Flows at Flat Frictional Walls
The Dynamic Coefficient for Collisional Granular Flows at Flat Frictional Walls
Author : Lei Zhang, Deyu Zhong and Lei Liu
This paper derives the expression of dynamic friction coefficient for collisional granular flows at flat walls. An important character of the new expression is that the effect of inhomogeneous of flows on the friction is under the consideration by using the velocity distribution function of particles described by the second-order solution of the Boltzmann equation rather than the Maxwellian velocity distribution. It shows that the inhomogeneous of flows, represented by the velocity gradient of the flows, plays an important role in the friction. Comparisons of the present study with the computer simulation results are presented, which shows that the analytical equation for dynamic friction coefficient agrees well. Furthermore, the influences of different parameters on the dynamic friction coefficient are also investigated, including coefficient of restitution, velocity gradient and solids fraction.
File Size : 889,859 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 20/07/2016
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