isotropic homogeneous turbulent flow field with OpenFoam

Matthias89 · January 12, 2012, 23:15

Hello!

Is it possible to generate a isotropic homogeneous turbulent flow field with OpenFoam and how long would it take for me as a OpenFoam beginner to finish that?

Thanks!

seboxx · January 16, 2012, 13:45

Correct me if I am wrong, but isn't isotropic, homogeneous turbulent flow a contradiction?
I mean you need local inhomogeneities for turbulent behaviour and non isotropy even for laminar flow right? I mean how can you have flow if your volume (or space ) is isotropic and homogeneous? What would drive the flow?

anishtain4 · February 5, 2012, 07:26

Yes seboxx, you are wrong, homogenous box of turbulence is a historical case which is in center of interest. Uniform flow after a grid is homogenous if you move with the average velocity. and it decays unless you force it to preserve which is not physically possible but as a numerical method

January 12, 2012, 23:15	isotropic homogeneous turbulent flow field with OpenFoam	#1
Matthias89 New Member Matthais Join Date: Jan 2012 Posts: 5 Rep Power: 14	Hello! Is it possible to generate a isotropic homogeneous turbulent flow field with OpenFoam and how long would it take for me as a OpenFoam beginner to finish that? Thanks!

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January 16, 2012, 13:45		#2
seboxx Member Join Date: Aug 2011 Posts: 33 Rep Power: 14	Correct me if I am wrong, but isn't isotropic, homogeneous turbulent flow a contradiction? I mean you need local inhomogeneities for turbulent behaviour and non isotropy even for laminar flow right? I mean how can you have flow if your volume (or space ) is isotropic and homogeneous? What would drive the flow?

February 5, 2012, 07:26		#3
anishtain4 Senior Member Mahdi Hosseinali Join Date: Apr 2009 Location: NB, Canada Posts: 273 Rep Power: 18	Yes seboxx, you are wrong, homogenous box of turbulence is a historical case which is in center of interest. Uniform flow after a grid is homogenous if you move with the average velocity. and it decays unless you force it to preserve which is not physically possible but as a numerical method