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specifying U components as boundary condition

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Old   June 3, 2011, 11:46
Default specifying U components as boundary condition
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I want to specify different boundary conditions for Ux, Uy and Uz

fixed value : 0 for Uy and Uz
zeroGradient : Ux

How I can do that? Can anyone please help! (sorry,I could not find ans. for the older posts)
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Old   June 4, 2011, 03:21
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Gregor Olenik
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i guess what you are looking for is the 'slip' condition

see http://www.openfoam.com/docs/user/boundaries.php

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Old   June 4, 2011, 05:29
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@ gregor,

The slip boundary condition does the opposite way.

For a patch parallel to yz -plane,

Instead of making Uy,Uz = 0 it makes Ux=0
Instead of zeroGradient at Ux it makes Uy,Uz zeroGradient.


After going through, the user guide what I understood is pressureInletVelcoity
looks similar to what I want. But I don't know if it works when total Pressure is specified.
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Old   June 7, 2011, 15:34
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I just spent some time with directionMixed BC and thats what I want.

Thanx,
Hari
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