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2 Replies
Last post: March 7, 2011 3:39pm UTC
September 10, 2010 2:47pm UTC
Fluid Structure Interaction with Contact
I'm trying to simulate a reed valve combining a fluid-structure interaction model with contact (i.e. the reed closing). I have been successful so far simulating the fluid-structure interaction of the reed and the fluid and modeling the contact problem separately, but haven't been able to combine the two. It seems that the FSI condition overrides the contact constraint.
Any suggestions? or example models?
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September 16, 2010 8:22pm UTC in response to John Larson
Re: Fluid Structure Interaction with Contact
I am trying to do the same in 4.0. By selecting the fsi module, you automatically setup certain defaults that are in conflict with the contact option. The fluid-solid interaction region will be written over when you declare these surface to be contact surfaces. Therefore, you have to re-insert the fluid surface load using using boundary load. Also, it seems like some prescribed mesh displacement for some surface is set to zero and this causes contact surfaces to go through each other. With limited success, I am able to run an fsi problem with contact. However, in many instances I am getting inverted mesh elements. So I am having convergence issues. I will be contacting COMSOL support group soon.
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March 7, 2011 3:39pm UTC in response to Trevor Munroe
Re: Fluid Structure Interaction with Contact
I am trying to do the same in 4.0. By selecting the fsi module, you automatically setup certain defaults that are in conflict with the contact option. The fluid-solid interaction region will be written over when you declare these surface to be contact surfaces. Therefore, you have to re-insert the fluid surface load using using boundary load. Also, it seems like some prescribed mesh displacement for some surface is set to zero and this causes contact surfaces to go through each other. With limited success, I am able to run an fsi problem with contact. However, in many instances I am getting inverted mesh elements. So I am having convergence issues. I will be contacting COMSOL support group soon.
I have the same problem during my modeling in 3.5a. What do you mean about "re-insert the fluid surface load using boundary load" ?
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