Volume Maps Resolution and Thickness Recommendations

[kyletreece]

Hello! I'm trying to use the volume maps boundary implementation and DFSPH pressure solver to simulation flow through thin channels and am hitting some issues. I have an emitter setup within the entry of a thin channel, and as it shoots particles I'm noticing some get stuck to the boundary walls and either the emitter shuts off early or the simulation seems to freeze once enough particles have interacted with the boundary. Reducing the particle size and increasing the map resolution seem to help how far the simulation runs before freezing, but I've yet to run one of these simulations to completion.

The size scale I'm working with is as follows:

• Channel bounding box: 0.17m x 0.002m x 0.245m
• particle radius tested: 0.001m, 0.0005m, 0.00025m

In addition to trying to determine what particle size criteria I should use for thin channels, I'm also attempting to calculate what volume map resolution I should use for a given particle radius. My thought process is that the volume map sampling must be less than the particle diameter. For particle radius of 0.00025m for example, if I apply a 10% margin (assuming 10% smaller particle diameter) I tried a volume map resolution of 378x5x545 but still experienced the mentioned sticking to boundary and eventual simulation freezing.

Any thoughts or suggestions regarding the boundary configuration and general particle size for a given channel thickness for a case like this would be greatly appreciated!