# Inertial resistance and viscous resistance in porous media

 Register Blogs Members List Search Today's Posts Mark Forums Read

 March 29, 2019, 05:40 Inertial resistance and viscous resistance in porous media #1 New Member   Join Date: Mar 2019 Posts: 1 Rep Power: 0 Hello everyone I am now reading the flunet user guide about how to calculate Inertial resistance and viscous resistance. But somehow I saw someone wrote this on the internet alpha = (D/150)*(epsilon^3/(1-epsilon)^3) C2=(3.5/D)*(1-epsilon)/epsilon^3 I only know that 1/alpha=viscous resistance and C2=Inertial resistance but he didn't said what D and epsilon stands for Does anyone know that where these equations come from? Thanks in advance!

 March 29, 2019, 13:44 #2 Senior Member   Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,147 Rep Power: 61 I think it comes from a correlation from packed beds (flow through soil). alpha is the permeability, epsilon is the porosity and d is the particle diameter. You have to be careful if epsilon is the area or volume porosity. wschao90 likes this.

 Tags porous media input