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August 7, 2009, 04:18 |
help with advection-diffusion equation
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#1 |
New Member
andrianomena
Join Date: Mar 2009
Location: madagascar
Posts: 23
Rep Power: 17 |
Hi there,
I'm solving an advection-diffusion equation(temperature equation) but it always crashes!!! Is it possible to solve an advection-diffusion equation?How? Can somebody out there help me please? Best Regards. |
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August 7, 2009, 12:15 |
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#2 |
Senior Member
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Hi,
What are the boundary conditions, methods used, and other relevant information. Yiu have to give more information, otherwise I will not be able to help you. Regards, Titio |
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August 8, 2009, 07:18 |
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#3 |
Senior Member
Sandy Lee
Join Date: Mar 2009
Posts: 213
Rep Power: 18 |
Hi Titio, could you help me too? I want to simulate the true pressures in the domain but not some relative pressure values. What boundary conditions I should give. I gave a fixValue in inlet and a zerogradient in outlet, but the results are wrong. By the way, my problem is turbulence flows. Thanks a lot.
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August 11, 2009, 06:54 |
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#4 |
New Member
andrianomena
Join Date: Mar 2009
Location: madagascar
Posts: 23
Rep Power: 17 |
Hi
Sorry for the delay in replying, In fact I'm modeling a porous media and through it a gas is circulating.The porous media is moving slowly(the gas flowing in cross-flow) that's why I have to take into account the advection term in the media temp equation,there is also a convective transfer between the media and the gas When I implement the temperature equation of the media without source it's ok but when I couple it with the gas temperature it crashes. boundaries are for T:fixedGradient at the inlet,fixedValue at the outlet for Tg:zerogradient at the outlet,fixedValue at the inlet Information:the inlet is the inlet of the gas flow! Thanks! |
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