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June 25, 2010, 05:29 |
Setting up a porous media
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#1 |
New Member
Nicholas
Join Date: Jul 2009
Posts: 13
Rep Power: 16 |
Hi all,
I've been having some trouble setting up a porous media flow in Star-CD v4 through a porous baffle. I know the force () and hence the pressure drop across the baffle and I need to calculate and : where is superficial velocity and is fluid density (I assume). I seem to have too many unknowns, since I do not know the superficial velocity... any ideas would be greatly appreciated. |
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June 25, 2010, 09:15 |
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#2 |
Member
Oliver Lauer
Join Date: Mar 2009
Location: Coburg
Posts: 57
Rep Power: 17 |
But you know pressure drop for a given mass flow. And you now the area of your porous baffle, and the density. So you can calculate a mean velocity. Better would be to have pressure drops for more than one mass flow because you have two unknowns
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June 25, 2010, 11:32 |
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#3 |
Senior Member
Pauli
Join Date: Mar 2009
Posts: 189
Rep Power: 17 |
You have one equation with two unknowns. You need the force/pressure drop at two or more flow rates. Then you can curve fit the equation to the data.
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June 25, 2010, 11:42 |
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#4 |
New Member
Nicholas
Join Date: Jul 2009
Posts: 13
Rep Power: 16 |
I have one force value, but I don't have an associated flow rate for that force. How can I calculate the flow rate in the porous media?
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