HyperWorks CFD – Darcy and Forchheimer Coefficients
Product: HyperWorks CFD
Product Version: HyperWorks CFD 2020.0 or above
Hyperworks CFD provides a simplified calculator to transfer user data in the form of velocity vs pressure drop to Darcy and Forchheimer coefficients required for AcuSolve. Once in the porosity micro dialog, click on the calculator icon to show the attached editor, where one can provide velocity and pressure drop data. The computed coefficients are also shown in the below table.
From the Flow ribbon, Domain tools, click the Porous tool (Select solid & specify orientation)
Comments

How are the permeability coefficients (K1, K2, K3) brought into the calculation in contrast to the Darcy and Forchheimer coefficients?
If the Darcy (D) value is related to velocity and the Forchheimer (F) value is related to velocity^2, are K1,2,3 multiplied to both D and F? D only? F only? Linearly, inversely? The math isn't clear in the user guide.
I'm speaking in reference to: https://en.wikipedia.org/wiki/Darcy's_law#Quadratic_law
So in Wikipedia, D = 1/k and F = 1/k_1
Thanks for the clarifying.
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