Fluid structure interaction module discussion 2
Hi, Dear all, I guess my previous request too complicated. So i start from a single one to demonstrate fluid structure interaction module, just two single rectangular. surprisingly it still cannot...
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attachd is 4.2a file. hope someone can give me some hint
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Hi well for me, you are fist of all starting with all initial conditions = 0 but BC's that tells me your are far from "0". OK you have used a step function with a smooth inlet, but you have a rise time...
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HI, lvar, Thank you for your insightful information. it give me a new way to try build the model. I will update you the latest information once i get back to my office. Thank you for knowledge sharing.
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Dear lvar and my friends, Thanks for lvar for bring me back to using COMSOL, as it looks has a lot of secret recipe now :p 1. Refer to the rectangular 4.2, the wall is add in to formulate no slip...
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will it still work if we release the fixed constraint ? I think that is more close to the blood vessel problem, right ? Thanks for your discussion and I did not get any help from comsol support...
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Hi, Siyuan, Thank you for keep the post alive. What makes you think to remove the fixed constraint? COMSOL support try their best already, we can discuss ourselves. Any method you have try to fix the...
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Hi one thing is striking me just now, you have two fluid physics, as you are mixing spf and fsi, if you look at the dependent variables of the main node you see the dependent variables therein. And you...
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Thanks lvar. My mistake, sorry. great, now it slowly progress. As my mentor always say, as engineer, you should has eagle eye and patience. so bad, I miss two. Update you all later. Now tune the solver...
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Hi, lvar, Thank you for the help. It is solved, however, is in laminar flow side, solid not reaction, any idea? back to just now confusion, 1. i include laminar inflow and outlet as my inlet to...
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Hi well if you vertical "tube" has an axis along "y" (in 2D adapt for x&z in 3D) then try an initial value of the pressure : p = p0 * ( y - y0 ) / Length where "p0" is the maximum pressure at the...
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Dear lvar, Thank you for knowledge sharing, what you say i will made in my next model and open the new discussion.;p by the way, the model get converge, it can converge smoothly, in my computer just...
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Hi Chiwei, According to my reading, the case we are trying to do is a bit different from the blood vessel model, which DID NOT really use the FSI module (you can read it from the model manual). The...
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Hi, Siyuan, Thank you for supporting this discussion. I agree with what lvar and you say, FSI boundary layer should not have anything. I would encourage you using FSI module rather than separate module...
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Hi A few comments on latest model: You have too many "prescribed displacements, no need to say something along the "r" direction of the axis of symmetry, as this defines dr=0 by default Your solid is...
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Dear lvar, Finally i can persuade myself it is not COMSOL problem and it is my physic problem after read your reply. It convince me that my model has physic problem. Thank you for llfe saving. Great to...
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hi I want to couple mixture model with structural. But in mixture model I can't define the loading or displacement induced by structural model. can you help me? regards
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