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Boundary constraints

Posted Apr 12, 2010, 7:10 p.m. EDT 0 Replies

John
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I have multiphysics on the same cylindrical tube with two fluid flows, so I have variables (u1,v1,p1,logk1,log1) and (u2,v2,p2,logk2 and logd2). I want to set the inlet of the first equal to the outlet of the second. These are in the same Geometry.

I've looked at Extrusion and Projection but that seems overkill (I can extrude from the outlet across the domain and then project that down). Identity boundary seems like the trick but I they disappear when I select the different physics.

Thanks, John
p.s. What I **really** want are the Dirichlet conditions on u1, etc then correspond to an infinitely long tube below the domain, not an "inlet", so that when the fluid enters the domain then it doesn't change velocity or turbulent profiles.

0 Replies Last Post Apr 12, 2010, 7:10 p.m. EDT
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