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compressible transient mixture of 3 gases - is there a suitable solver?

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Old   January 5, 2010, 17:26
Question compressible transient mixture of 3 gases - is there a suitable solver?
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Axel Tietjen
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Dear Foam-Users,

I have to simulate the flow and mixing of three different gases in a closed chamber with one inlet under raising pressure.

Since now I used rhoPisoFoam to see at least the flow and turbulence within the chamber while (some) gas streams in. But although I set up thermophysicalProperties, initial state and boundary conditions for the different gases, the related fieldvariables dissappear at the next timesteps. So I have to use another solver, I suppose.

But the multiphase solvers are incompressible or inmiscible.

And the engineFoam seems also suitable at the first look, but I can't see the gas-concentrations, when I examine the engineFoam tutorial's results.

Is there any possibility to setup a solver for this problem without writing or modifying some code?

I'd appreciate any Ideas about that.

greetings
Axel
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Old   January 15, 2010, 21:01
Default reactingFoam without reaction?
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Axel Tietjen
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Dear Foamers,

I've found out that I could possibly use reactingFoam for my application. I thought that changing the values for "chemistry" in the chemistryProperties file to "off", would switch the reaction off.

When I run that solver with my case, everything seems fine, at first. I can see for example the concentration-fields of each spezies change over the first timesteps, but then the execution stops. The error ist the temperature raising above the specified (janaf) range.

I'll keep on trying with that solver, maybe it will run some day...
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Old   January 17, 2010, 01:24
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Alberto Passalacqua
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Hi,

take a look at this:

http://www.cfd-online.com/Forums/ope...tml#post200489

Best,
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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.
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