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Fluent -udf-density computation of species.

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Old   April 17, 2018, 01:45
Default Fluent -udf-density computation of species.
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In my UDF code i want to convert my species mass fraction into concentration of the species . So the best way to do it is to multiply with density

Y_co2=C_YI(c, t, 2); /*Mass fraction */
Y_co=C_YI(c, t, 5);

X_co2=Y_co2*C_R(c, t); /*( kg/m3 )*/
X_co=Y_co*C_R(c, t);

But should i multiply with the species density or the density of the unit cell like i have done here. If its species to get it through UDF?
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combustion modeling, density udf, fluent - udf, species transport

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