|December 15, 2014, 15:06||
how to calculate the porosity flow rate?
Join Date: Mar 2014
Posts: 4Rep Power: 3
Hello I need fast help and unfortunatly i found nothing in my search (thats is unusual ). My solution doesn't work.
My case is incompressible and isothermal. I have a porous zone where I want to calculate the porosity more or less so that I get a certain flowspeed in that area.
I took the equation from the Darcy Forchheimer header file.
S = - (mu*d + 0.5*rho*U²*f)
I assumed that S is a force and flow only flows in one direction so I took the U into the brackets.
So I thought about setting d to zero and using a bernulli equation to substitute S.
S = - deltaP * A =- 0.5*rho*(U²-U²_after)*A
After substituting this I relocated it to f:
f = A*(1-U²_after/U²)
But it doesn't work. The values are to low. So what all do I wrong.
Thanks for every help!
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