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Outlet BC with velocity at boundary

Posted 29 juin 2015, 11:48 UTC−4 Fluid & Heat Version 4.4 0 Replies

Marta Iversen
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Hi,

I am using COMSOL 4.4 and the FSI physics with a Time Dependent Study. I want to define an outlet BC with laminar outflow so I can define the exit length at the outlet which is important for the model. Problem is, I want the outlet to have the specified velocity or pressure that is solved by COMSOL when the pressure is put into the model with my inlet condition. How can I define the velocity of the outlet to be what the velocity will be at that boundary? I tried to define the exit pressure as "fsi.p" or velocity as "fsi.U" but I always get the error: "Failed to evaluate variable Jacobian".

Any help is appreciated!!
0 Replies Last Post 29 juin 2015, 11:48 UTC−4
COMSOL Moderator

Hello Marta Iversen

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