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August 30, 2012, 05:14 |
radiative cooling of the fluid (Ar)?
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#1 |
New Member
Niko Kivel
Join Date: Jul 2012
Posts: 4
Rep Power: 14 |
Hi FOAMers
I'm a beginner in CFD and OpenFOAM in particular. Yet I managed to implement and solve a problem of an Ar-plasma being extracted into a vacuum chamber. The solution is stable, but the temperature seems to high. Short description: A vacuum chamber is held at 150 Pa and has an opening with a fixed pressure a 1 atm. The mesh is axi-symetric. The Ar-plasma is defined to be 5000 K and is not really a plasma, it's just hot Ar. A nice supersonic jet is forming in the vacuum. The problem with the jet is a more or less constant temperature. The hot Ar should cool down due to the radiation. But, I have no glue how to implement that into the definitions for rhoCentralFoam. Any ideas howto implement radiative cooling of the fluid? cheers Niko |
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August 30, 2012, 10:16 |
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#2 |
Senior Member
Olivier
Join Date: Jun 2009
Location: France, grenoble
Posts: 272
Rep Power: 18 |
hello,
You might take a look at http://www.tfd.chalmers.se/~hani/pdf...aLicThesis.pdf You will find details about the radiation loss and enthalpy. However this is not vanilla OpenFoam, so you 'll have your hand dirty. regards, olivier |
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August 30, 2012, 10:23 |
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#3 | |
New Member
Niko Kivel
Join Date: Jul 2012
Posts: 4
Rep Power: 14 |
Quote:
I was hoping for a simpler solution to the problem. But if there is nothing "vanilla" around, I guess I have to bury that project. cheers Niko |
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August 30, 2012, 10:51 |
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#4 |
Senior Member
Olivier
Join Date: Jun 2009
Location: France, grenoble
Posts: 272
Rep Power: 18 |
hello,
There is not such solver in OpenFoam, but all the piece are here: - add radiation to rhoCentralFoam (look at a similar solver bluid with) - then add the "plasma specific" properties good luck ! regards, olivier |
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Tags |
radiative cooling, rhocentralfoam |
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