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kam July 28, 2006 04:15

reverse flow

I am modeling fire in a single room by volumetric energy and mass sources. The room has a door. I extended the domain outside the room so I can compute better flow through the door. I set the boundary of the extended domain as pressure outlet. I am having reverse flow on this boundary which I think is causing convergence problem for me. So is that the nature of the flow or numerical error resulting from illness in settings?

Thank you, kam

Miguel July 31, 2006 07:57

Re: reverse flow
Hi Kam,

I would consider two main factors, the gas expation due to the heat and the fact that O2 occupies less volume when binden to a carbon dioxide. Just then you could have reverse flow.


kam July 31, 2006 09:14

Re: reverse flow
Thanks miguel, For the first factor Ive tried with both constant and temperature dependant propeties and I had reverse flow with both. Considering the second one I dont now if Ive got you well but if you mean O2 is entrained into the domain so you want to say it is the nature of the case. Well I dont really know and I will still appreciate any conribution.


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