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how to use Tait Equaton of state in compressibleInterFoam?

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Old   July 12, 2020, 10:15
Exclamation how to use Tait Equaton of state in compressibleInterFoam?
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yahya rezvani
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hello. I want to use the Tait equation of state in compressibleInterFoam. in some documents, they said this is New compressibility models in OpenFOAMŪ but in help or tutorial, I can't see any guide to use it.
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Old   February 16, 2022, 03:45
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cbarring
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The Tait equation is the adiabaticPerfectFluid EOS. I am using the code below within the thermophysicalProperties.water file in compressibleInterFoam in OF7 (In OF8 & 9 I get a bunch of errors that I am trying to figure out).

I did a curve fit to isentropic liquid water data to get the gamma and B values. These are relevant for my particular project. In the open literature you will find a lot of different values for gamma and B. You will need to figure out the values that fit the fluid properties for your particular situation. This will require some (non-linear) curve fitting. This is really important or you may get very strange numbers. The values below for gamma and B may be totally wrong for your situation.

thermoType
{
type heRhoThermo;
mixture pureMixture;
transport const;
thermo eConst;
equationOfState adiabaticPerfectFluid;
specie specie;
energy sensibleInternalEnergy;
}

mixture
{
specie
{
nMoles 1;
molWeight 18.01528;
}

equationOfState
{
// water
rho0 1000; // approx
p0 100000;
gamma 7.15;
B 304913000;
}

thermodynamics
{
Cv 4186;
Hf 0;
}
transport
{
mu 3.645e-4;
Pr 6.99;
}
}
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