Learning Forum

[4sur]

Hi all!
I am trying to simulate the separation of the two spieces of a mixture by means of temperature. I have a closed gap (containing the liquid mixture and the porous media) where I apply a cold temperature (10ºC) in the lower part and a hot temperature (40ºC) in the upper part. The most dense liquid travels to the coldest wall and the least dense one goes to the hot wall. When I try to simulate this without the porous media, I get the expected results. However, when introducing the porous media, I expect the velocity of separation to be smaller, but the results I get are exactly the same. In the porous media's setup, I have determined the viscous resistance following Blake-Kozeny equation and the relative viscosity with the brinkman correction. In the velocity formulation, I have tryed with both physical and superficial velocity setups.
Am I doing something wrong?
BTW, I have read in the users guide that "Ignoring convective acceleration and diffusion, the porous media model then reduces to Darcy’s Law:". May it be that my velocity of separation does not change due to that assumption? And in that case, what can I do to perform this simulation?
Thank you in advance