Porosity inputs

soni7007 · February 25, 2013, 16:53

Hello,

I want to input the isotropic loss parameters (lienar and quadratic) in the form of "permeability" and the "resistance loss coefficient". I have calculated the permeability using the experimental data and the darcy's equation.
How do I calculate the "resistance loss coefficient". The units are m(-1). Is it the inverse of the filter thickness?

Thanks in advance!

cdegroot · February 25, 2013, 21:33

It is not the inverse of the filter thickness. Check the theory guide for its definition. It is a coefficient multiplying 1/2*rho*velocity^2. If the flow rate is very low (i.e. no inertial effects so Darcy's law is valid) then it can be set to zero.

February 25, 2013, 16:53	Porosity inputs	#1
soni7007 New Member CFDLife Join Date: Apr 2009 Posts: 7 Rep Power: 17	Hello, I want to input the isotropic loss parameters (lienar and quadratic) in the form of "permeability" and the "resistance loss coefficient". I have calculated the permeability using the experimental data and the darcy's equation. How do I calculate the "resistance loss coefficient". The units are m(-1). Is it the inverse of the filter thickness? Thanks in advance!

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February 25, 2013, 21:33		#2
cdegroot Senior Member Chris DeGroot Join Date: Nov 2011 Location: Canada Posts: 414 Rep Power: 18	It is not the inverse of the filter thickness. Check the theory guide for its definition. It is a coefficient multiplying 1/2rhovelocity^2. If the flow rate is very low (i.e. no inertial effects so Darcy's law is valid) then it can be set to zero.