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cb-geo / mpm

CB-Geo High-Performance Material Point Method
https://www.cb-geo.com/research/mpm
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The particle_traction define #584

Closed fengzekang closed 4 years ago

fengzekang commented 4 years ago

Hello, developer, The particle traction force, how to deal with it?( I know the gravity is the external force for the particle) We should define this whether it is the solid or liquid phase? Best regards

kks32 commented 4 years ago

Hi @fengzekang

Please post user questions to https://forum.cb-geo.com/c/mpm/ so it will benefit a wider community. Issues on GitHub are for code related bugs.

Please refer to https://mpm.cb-geo.com/#/user/preprocess/input?id=loading for applying loading conditions

fengzekang commented 4 years ago

Hello， @kks32 I have some problem about the fluid simulation. I want to post the question on the https://forum.cb-geo.com/c/mpm/ .But maybe there is an error on this site. 5 The above picture is that I use the newtonian fluid and set the parameters with bulk=2.18e9, mu=0.001 and dt=1e-5. The problem is that some particles flying away and then the whole system broke, I think this is the unstable calculation phenomenon， but I am not sure about the reason. Did you have any idea or suggestion. By the way, when to use the "pressure smoothing" and what is its function? Best regards.