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compressible flow of water vapor

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Old   February 13, 2012, 12:46
Default compressible flow of water vapor
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Florian
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Hi all,

is there a possibility to solve the rhoPorousMRFLTPimpleFoam with steam (water vapor) as fluid ???? Or any other solver???
I don't want to simulate condensation or evaporation. Only the folw of vapor.

Some details about the simulation:
I want to simulate the flow of water vapor in a turbocharger. The pressure at the inlet is about 2.5 bar abs. and at the outlet 1 bar. The velocity in the turbocharger is about 200 m/s - 300 m/s (no supersonic).

At the moment I simulate it with air. But water vapor is rot a ideal gas.
Some ideas????

kind regards
Florian
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Old   February 14, 2012, 13:16
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Florian
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Hi all,

I changed my thermophysicalProperties into the following:

FoamFile
{
version 2.0;
format ascii;
class dictionary;
location "constant";
object thermophysicalProperties;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

thermoType hPsiThermo<pureMixture<constTransport<specieThermo <hConstThermo<perfectGas>>>>>;

mixture
{
specie
{
nMoles 1;
molWeight 18;
}
thermodynamics
{
Cp 2080;
Hf 0;
}
//for steam with p=1.75bar and T=150°C
transport
{
mu 1.414e-5;
Pr 0.985;
}
}

I'm not sure if this is a good way to simulate water vapor...
I am confused about the Hf (User Guide: heat of fusion). What is the heat of fusion for water vapor?????
What is this exactly??

kind regards
Florian
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Old   February 16, 2012, 03:58
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Florian
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Hi all,

the results with this thermophysicalProperties looks reasonable for the density, pressure and temperature.

kind regards
Florian
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