Improved wall weight function with polygon boundary in moving particle semi-implicit method

A wall boundary condition represented by polygons was presented by Harada et al. based on the moving particle semi-implicit (MPS) method to reduce the memory cost and calculation time for the wall particles. However, the inaccuracy of the wall weight function near a non-planar wall boundary causes the unphysical motion of the fluid. Therefore, this paper proposes an improved wall weight function for non-planar wall boundaries. Hydrostatic and dam break simulations with and without a wedge in a water tank are conducted to demonstrate the improvement.

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