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Laminar velocity profile as inlet BC

Posted May 3, 2010, 5:50 a.m. EDT 0 Replies

Mark van Gerven
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Hello,

I want to simulate a laminar fluid flow through a straight pipe (vertical cylinder).
Instead of an inlet velocity (number) I want a laminar velocity profile as inlet boundary condition.

I found a micromixer example in the comsol model lib..
Comsol Multiphysics>> Fluid Dynamics>> Micromixer
The inlet boundary condition for this exemple is:
U0 = (9/4)*U_mean*16*s1*(1-s1)*s2*(1-s2).
This results in a laminar velocity profile.

What should be my inlet boundary condition?
Copy and pasting results in a kind of sickle shaped velocity profile..

I hope someone can help me out.

Thanks!
Greetings,
Mark.
0 Replies Last Post May 3, 2010, 5:50 a.m. EDT
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Hello Mark van Gerven

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