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The correct BCs for defining an "open room".

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Old   March 8, 2010, 06:28
Default The correct BCs for defining an "open room".
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Hello dear Foamer,

I am struggeling for some time with the problem defining the boundary conditions correctly.

What is my aim?

The domain should be an "open room", that means there is a free air exchange, so that air can flow into the domain and as a result the domain's temperature is always constant. As an example 293 kelvin.

I don't find the correct BC-parameter for my domain, so the simulation always aborts and/or there is no really air exchange.

If I define all boundaries as walls, the simulation is working stable, but then there won't be any fresh air exchange and the air heats up.


So maybe some of you have experience with this issue and can help me a bit


Best regards.

Last edited by suitup; March 8, 2010 at 07:36. Reason: spelling
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Old   March 8, 2010, 07:18
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Cean
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which slover are you using?

I am also interted in room ventilation.
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Old   March 8, 2010, 07:35
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Hi,


I am using the chtmultiregion-solver, but actually there shouldn't be so much difference between the solvers I guess (or hope )
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Old   March 8, 2010, 15:32
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Gregor Olenik
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hi

you should have a look at the interFoam tutorial for the use of atmospheric boundary conditions
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