Porous jump model
 

i am currently trying to model a FLUENT 2D perforated plate with mach 2 flow across it, using the perforated plate with suction as a means of boundary layer control. i am having trouble with the values of permeability, porous medium thickness and pressure jump coefficient in FLUENT and would like any advide on what values i should be suing for these fields

cheers alastair

Re: Porous jump model
 

G'day alastair,

Not certain, I had a similar problem with a permeable facing used for acoustic foams - if you have not tried the archives under in cfd-online then I sufggest you you do as I think I saw a similar problem there.

You should look at the theoryin the fluent help, and how the model is applicable. I am just guessing that the thickness is the thickness of the plate - as in my problem (simple incompressible flow) this is the case. The pressure drop across a pressure drop is proportional to

With permeability I am not sure what the deal is with supersonic flow. In acoustics permeability is the material property - however some investigators have tried empirical formulae - which is unlikely to be applicable to your case

Good Luck

porous jump model
 

How to calculate permeability (k,m2) when porosity is known and thickness of the porous medium is known.
velocity =5.6 m/s
Discrete phase model
primary phase water vapor
discrete phase liquid droplets