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3D/2D Hydrodynamic force calculation

Posted Mar 31, 2010, 11:37 p.m. EDT 4 Replies

Hari Krishnan
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I need to calculate the 3D/2D hydrodynamic force on a moving sphere in pressure driuven flow in a rectangular or parallel plate microchannel. I need to take into account of the boundary effect of the particle on the fluid flow.

I understand people use BEM/BIM or LBM to solve such problems.

Is it possible to solve the above problem using COMSOL using ALE Moving Mesh/Level Set method?




4 Replies Last Post Apr 1, 2010, 8:42 a.m. EDT
Danial Tz
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Posted: 1 decade ago Apr 1, 2010, 2:50 a.m. EDT
something like this? www.comsol.com/community/exchange/17/
something like this? http://www.comsol.com/community/exchange/17/
Hari Krishnan
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Posted: 1 decade ago Apr 1, 2010, 4:15 a.m. EDT
Thanks Danial. I believe this should work. It would be nice to see the model on COMSOL User Interafce.
Thanks Danial. I believe this should work. It would be nice to see the model on COMSOL User Interafce.
Danial Tz
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Posted: 1 decade ago Apr 1, 2010, 5:55 a.m. EDT
It is possible, but very inconvenient. You have to do remeshing by hand each time you have inverted mesh (a problem that happens when there is large movement of ALE mesh). So, it is much easier to let matlab code take care of it.
It is possible, but very inconvenient. You have to do remeshing by hand each time you have inverted mesh (a problem that happens when there is large movement of ALE mesh). So, it is much easier to let matlab code take care of it.
Hari Krishnan
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Posted: 1 decade ago Apr 1, 2010, 8:42 a.m. EDT

Thanks.

I just tried to run the code in COMSOL script. However, I am getting the message,

" Failed to find consistent initial values - last time step has not converged"
Thanks. I just tried to run the code in COMSOL script. However, I am getting the message, " Failed to find consistent initial values - last time step has not converged"

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