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Calculating pressure loss through porous plastics

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threeway

Mechanical
Joined
Jun 4, 2003
Messages
10
Location
NL
Hello everyone,

I am looking for a way to calculate the pressure loss through porous plastics, without data from a manufacturer.

Is there any global theory about this? Or is one always refered to the manufacturers data ?

Off course some information is required, like outer velocity/pressure and porosity of the material, but this is available.

Thanks in advance
 
Darcy's law is used for pressure drop through porous media.
 
Yes, it is true... and to use the Darcy's law you just need the permeability and the dynamic viscosity of the liquid.

 
I know of the Darcy-Forhheimer equation (Delta p = C1*V^2+C2*V), which relates the pressure to the velocity through the porous surface, which is the relation I want.

But the problem is that you need the coefficients C1 and C2, and I don't have those.
I could retrieve them from experiments, but I'd like to skip those. Is there a database for these kind of coefficients ?

I want to find the relation between pressure loss and velocity, and not only calculate the pressure.


 
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