November 26, 2022 at 6:56 ampavankonchada123Subscriber
I am trying to use below udf for surfacearea_volume in ansys fluent for porous media in reactions but Iam not able to see any udf in drop down
solid_volume = C_DPMS_CONCENTRATION(c,t)/2300;
void_fraction = (1-solid_volume)/solid_volume;
F_PROFILE(c,t,i) = M_PI*pow((6*C_VOLUME(c,t)*void_fraction/M_PI),0.66666)/C_VOLUME(c,t);
November 26, 2022 at 6:58 ampavankonchada123Subscriber
And also tried to use expression but it is saying expression is not single valued
(1 - (DPMConcentration*1[m^3/kg] / 2300)) / (DPMConcentration*1[m^3/kg] / 2300)
3.14*1[m^-1] / (CellVolume*1[m^-3]) * (6 * CellVolume*1[m^-3]*void_fraction1 / 3.14) ^ 0.666
November 28, 2022 at 7:14 amDrAmineAnsys Employee
What do you want to modifiy? Probably it requires a single valued expression and not a field.
November 28, 2022 at 8:23 ampavankonchada123Subscriber
Surface to volume ratio for reaction in porous media.
Can you let me know which macro should I use define profile is not working
November 28, 2022 at 8:32 amDrAmineAnsys Employee
That input cannot be provided via a profile it requires a single valued input.
November 28, 2022 at 8:37 ampavankonchada123Subscriber
But my value depends on void fraction on each cell of domain. Is there any way I can define different values on different cells with voidfraction as variable
November 28, 2022 at 10:53 amDrAmineAnsys Employee
Built-in capability: I need to say no. You require more efforts to do that. For that reason, I think we should enhance this and allows the value to be a field input. I will discuss this with my colleagues.
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