Compressible Flow over Airfoil. Boundary Conditions

jose21 · December 9, 2010, 13:36

Hello,

I would like to know which are the proper boundary conditions when solving the subsonic compressible flow over an airfoil. From my experience I know that in Fluent there is an special bc: FarField which is valid for both upstream and downstream far field. In OpenFoam I haven't found it and I am using freeStream, but I don't get the right solution. The solver that I am using is rhoSimpleFoam.

I am surprised that there is a little OpenFoam information about airfoils in subsonic compressible flow, there is a tutorial about the incompressible flow over an airfoil but nothing about compressible... anybody has an example of the resolution of such problem?

Thanks

nakul · December 11, 2010, 13:04

Hi,

You may try zeroGradient at the outlet and places where you want a "far-field" condition.

You can also try specifying a fixed value of pressure at outlet for subsonic flow.

sh.d · November 3, 2013, 07:58

hi jose21
I have a question similar to your question.
Did you find appropriate boundary conditions?
mach number: 0.5
and Re: 30*10^6

December 9, 2010, 13:36	Compressible Flow over Airfoil. Boundary Conditions	#1
jose21 New Member Join Date: Nov 2010 Posts: 3 Rep Power: 16	Hello, I would like to know which are the proper boundary conditions when solving the subsonic compressible flow over an airfoil. From my experience I know that in Fluent there is an special bc: FarField which is valid for both upstream and downstream far field. In OpenFoam I haven't found it and I am using freeStream, but I don't get the right solution. The solver that I am using is rhoSimpleFoam. I am surprised that there is a little OpenFoam information about airfoils in subsonic compressible flow, there is a tutorial about the incompressible flow over an airfoil but nothing about compressible... anybody has an example of the resolution of such problem? Thanks Last edited by jose21; December 9, 2010 at 15:33.

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December 11, 2010, 13:04		#2
nakul Senior Member Nakul Join Date: Apr 2010 Location: India Posts: 147 Rep Power: 16	Hi, You may try zeroGradient at the outlet and places where you want a "far-field" condition. You can also try specifying a fixed value of pressure at outlet for subsonic flow.

November 3, 2013, 07:58		#3
sh.d Member Join Date: Oct 2012 Posts: 47 Rep Power: 14	hi jose21 I have a question similar to your question. Did you find appropriate boundary conditions? mach number: 0.5 and Re: 30*10^6