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I don't able to get grey mean combstion coefficients of methnol.

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Old   October 2, 2020, 15:08
Default I don't able to get grey mean combstion coefficients of methnol.
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Janeshwar Sharma
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please help me in knowing the radiation emission properties of methanol.
The code I posted has CH4 as a furl but in my case CH3OH is the fuel.So can you help me to know the radiation properties and grey mean combustion coefficients of CH3OH.





radiation on;

radiationModel fvDOM;

fvDOMCoeffs
{
nPhi 2; // azimuthal angles in PI/2 on X-Y.(from Y to X)
nTheta 2; // polar angles in PI (from Z to X-Y plane)
tolerance 1e-1; // convergence tolerance for radiation iteration
maxIter 1; // maximum number of iterations
}

// Number of flow iterations per radiation iteration
solverFreq 10;

absorptionEmissionModel greyMeanCombustion;

constantCoeffs
{
absorptivity 0.01;
emissivity 0.01;
E 0;
}

greyMeanCombustionCoeffs
{
lookUpTableFileName none;

EhrrCoeff 0.0;

CO2
{
Tcommon 200; // Common Temp
invTemp true; // Is the polynomial using inverse temperature.
Tlow 200; // Low Temp
Thigh 2500; // High Temp

loTcoeffs // coefss for T < Tcommon
(
0 // a0 +
0 // a1*T +
0 // a2*T^(+/-)2 +
0 // a3*T^(+/-)3 +
0 // a4*T^(+/-)4 +
0 // a5*T^(+/-)5 +
);
hiTcoeffs // coefss for T > Tcommon
(
18.741
-121.31e3
273.5e6
-194.05e9
56.31e12
-5.8169e15
);

}

CH4
{
Tcommon 200;
Tlow 200;
Thigh 2500;
invTemp false;

loTcoeffs
(
0
0
0
0
0
0
);
hiTcoeffs
(
6.6334
-0.0035686
1.6682e-8
2.5611e-10
-2.6558e-14
0
);
}
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