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Adding terms to the equations of a given CFD physics
Posted Feb 16, 2011, 12:25 p.m. EST Computational Fluid Dynamics (CFD), Parameters, Variables, & Functions Version 4.0, Version 4.0a 1 Reply
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I am interested in the viscoelastic fluid. The equation I want to integrate is equation number (1) of the paper I'm sending in annex. It is the Navier Stokes equation in the Stokes regime with two extra-terms (one depending on the second derivative of the velocity on time and another on the gradient of pressure). I believe it is possible to modify the incompressible stokes flow module (of Multiphysics) changing the default equations.
I have now access to Comsol 4 and I am having trouble on finding a good explanation on how to change these terms in equations of CFD physics. I don't seem to find the global equation view where these could be implemented. I also don't know how to use weak contribution forms. Could anyone help me with this procure, either with a short explanation, good reference on documentation material (or book) or any similar example.
Than you very much.
Best regards
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Hello Joana Oliveira
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Did you figure out the solution to this problem? I met the similar problem and appreciate your help.
John