Inlet profile from 2D velocity and turbulence data

Attesz · March 10, 2012, 05:26

Hi Foamers,

I'm dealing with a simple 3D pipe. I have measurements at the inlet, which is the radial and axial velocity, turbulentKE and nut in terms of the radial distance from the wall. I want to impose this data in U, k and nut and calculate epsilon.

1. If I define my parameters as in the pitzDailyExptInlet tutorial, that is giving the coordinate of the points and the give the values, I'll have the values along one line at the inlet, right? So the values will be interpolated to the nodes?

2. How can I "rotate" the values all along the inlet face to have the data everywhere? Is there a specific BC for that? I'm thinking about cylindricalInletVelocity BC type, but what about k and nut?

Thank you in advance,
Attila

alberto · March 11, 2012, 06:53

groovyBC is your friend: http://openfoamwiki.net/index.php/Contrib_groovyBC

Now it is part of swak4Foam, but the previous page is still useful for info: http://openfoamwiki.net/index.php/Contrib/swak4Foam

Attesz · March 11, 2012, 07:09

Hello Alberto,

thanks. Finally I'm using a 2D case and the timeVaryingMappedFixedValue type.

Best,
Attila

March 10, 2012, 05:26	Inlet profile from 2D velocity and turbulence data	#1
Attesz Senior Member Attesz Join Date: Mar 2009 Location: Munich Posts: 368 Rep Power: 17	Hi Foamers, I'm dealing with a simple 3D pipe. I have measurements at the inlet, which is the radial and axial velocity, turbulentKE and nut in terms of the radial distance from the wall. I want to impose this data in U, k and nut and calculate epsilon. 1. If I define my parameters as in the pitzDailyExptInlet tutorial, that is giving the coordinate of the points and the give the values, I'll have the values along one line at the inlet, right? So the values will be interpolated to the nodes? 2. How can I "rotate" the values all along the inlet face to have the data everywhere? Is there a specific BC for that? I'm thinking about cylindricalInletVelocity BC type, but what about k and nut? Thank you in advance, Attila __________________ I am doing CFD Consulting Services. Ich biete CFD Strömungssimulationen an.

March 11, 2012, 06:53		#2
alberto Senior Member Alberto Passalacqua Join Date: Mar 2009 Location: Ames, Iowa, United States Posts: 1,912 Rep Power: 36	groovyBC is your friend: http://openfoamwiki.net/index.php/Contrib_groovyBC Now it is part of swak4Foam, but the previous page is still useful for info: http://openfoamwiki.net/index.php/Contrib/swak4Foam __________________ Alberto Passalacqua GeekoCFD - A free distribution based on openSUSE 64 bit with CFD tools, including OpenFOAM. Available as in both physical and virtual formats (current status: http://albertopassalacqua.com/?p=1541) OpenQBMM - An open-source implementation of quadrature-based moment methods. To obtain more accurate answers, please specify the version of OpenFOAM you are using.

March 11, 2012, 07:09		#3
Attesz Senior Member Attesz Join Date: Mar 2009 Location: Munich Posts: 368 Rep Power: 17	Hello Alberto, thanks. Finally I'm using a 2D case and the timeVaryingMappedFixedValue type. Best, Attila __________________ I am doing CFD Consulting Services. Ich biete CFD Strömungssimulationen an.

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