New to Compressible Flow. thermophysicalProperties file

JackW · August 27, 2012, 21:13

Hi,

I am currently running a case, where I can no longer discount some effect of compressibility. Trouble is I have no experience of running anything compressible.

I am trying either rhoSimplecFoam or rhoSimpleFoam, thinking it would be a quick switch over from my current simpleFoam case. Unfortunately I have got a little stuck in the thermophysicalProperties file and what exactly to specify in 0/.

For some reason I only have a rhoSimplecFoam tutorial and no rhoSimpleFoam tutorial. I have looked for wikis etc on the algorithms but have found very little. Instead I am working from the squareBend tutorial

Firstly under specie I was not planning on changing anything from the squareBend as I assumed this would be for an ideal gas.

Secondly, I have NO idea what Hf, As and Ts are and I am assuming Cp is pressure coefficient, but I don't understand how you can specify this in the constant directory?

Any help/pointers/tips would be very much appreciated. Thank you very much

Jack

Chris Lucas · August 30, 2012, 03:02

Hi,

Cp --> Heat Capacity

As and Ts are model coefficients --> have a look at the sutherland model

Christian

JackW · August 30, 2012, 16:12

thanks!

Was really struggling to find documentation on the compressible models.

Jack

August 27, 2012, 21:13	New to Compressible Flow. thermophysicalProperties file	#1
JackW Member Jack Join Date: Aug 2012 Posts: 47 Rep Power: 13	Hi, I am currently running a case, where I can no longer discount some effect of compressibility. Trouble is I have no experience of running anything compressible. I am trying either rhoSimplecFoam or rhoSimpleFoam, thinking it would be a quick switch over from my current simpleFoam case. Unfortunately I have got a little stuck in the thermophysicalProperties file and what exactly to specify in 0/. For some reason I only have a rhoSimplecFoam tutorial and no rhoSimpleFoam tutorial. I have looked for wikis etc on the algorithms but have found very little. Instead I am working from the squareBend tutorial Firstly under specie I was not planning on changing anything from the squareBend as I assumed this would be for an ideal gas. Secondly, I have NO idea what Hf, As and Ts are and I am assuming Cp is pressure coefficient, but I don't understand how you can specify this in the constant directory? Any help/pointers/tips would be very much appreciated. Thank you very much Jack

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August 30, 2012, 03:02		#2
Chris Lucas Senior Member Christian Lucas Join Date: Aug 2009 Location: Braunschweig, Germany Posts: 202 Rep Power: 17	Hi, Cp --> Heat Capacity As and Ts are model coefficients --> have a look at the sutherland model Christian

August 30, 2012, 16:12		#3
JackW Member Jack Join Date: Aug 2012 Posts: 47 Rep Power: 13	thanks! Was really struggling to find documentation on the compressible models. Jack