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Old   March 13, 2011, 10:53
Default Resistance Loss Coefficient
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K. D.
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Hello,
can someone tell me how to calculate the "Resistance Loss Coefficient" and/or the "Linear Resistance Coefficient" for use in the CFX Porosity Settings Tab?
Found nothing on the web unfortunately, so thanks a lot in advance!

Last edited by drb764; March 13, 2011 at 11:20.
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Old   March 13, 2011, 19:01
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Glenn Horrocks
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You use the coefficients to match a porous medium to experimental results. Do youy have experimental results?
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Old   March 13, 2011, 23:44
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Ji Guozhao
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make use of you experiment data of pressures and velocities. you can refer the equation 1.146 in ANSYS CFX-Solver Theory Guide, at page 33. then you can obtain Kperm and Kloss via your experimental data. you can contact me if you like, because i just studied that days ago.
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Old   March 14, 2011, 07:14
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what i have are the laminar and turbulent permeabilities k1 and k2 which correspond to this equation:

dP/L = mu/k1 * U + rho/k2 * U^2

Looks similar to the equation in Solver Theory Guide, but are these the values I need?

Thank you so far!
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Old   April 21, 2014, 02:28
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Hi Gentlemen,

I am on the process of calculating the Linear & Quadratic loss coeff. Via experimental Data (V vs P) but the equation im getting from the graph is giving a negative (-) Value for permeability.

Please Help me remedy this problem.

Thank you very Much.
-will
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