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AbstractWe present a new particle-based method for granular flow simulation. In the method, a new elastic stress term, which is derived from a modified form of the Hooke's law, is included in the momentum governing equation to handle the friction of granular materials. Viscosity force is also added to simulate the dynamic friction for the purpose of smoothing the velocity field and further maintaining the simulation stability. Benefiting from the Lagrangian nature of the SPH method, large flow deformation can be well handled easily and naturally. In addition, a signed distance field is also employed to enforce the solid boundary condition. The experimental results show that the proposed method is effective and efficient for handling the flow of granular materials, and different kinds of granular behaviors can be well simulated by adjusting just one parameter. © 2012 Science China Press and Springer-Verlag Berlin Heidelberg.
SponsorsThis work was supported by National Natural Science Foundation of China (Grant Nos. 60773030, 60833007) and Studentship and Research Grant of University of Macau. We would like to thank Prof. Liu Moubin (Institute of Mechanics, Chinese Academy of Sciences, Beijing, China) for his long-time help and advices on the SPH method.