Learning Forum

[AmkJU]

 

I have written a udf for the above equation.

I am not getting the correct results for the circular channel.

Please check if udf is correct or not??

 

#include "udf.h"

#define mu_ref 0.001005

#define temp_ref 293

DEFINE_PROPERTY(viscosity_T,c,t)

{

real mu_lam;

real T = C_T(c,t);

mu_lam = mu_ref * ( pow((T/temp_ref),8.9) ) * exp( 4700 * ((1/T)-(1/temp_ref)) );

return mu_lam;

}

 

Thank You.

 

[DrAmine]

Looks Ok.

[Karthik R]

Hello,

please share more on what you think are the issues with your results? Are you seeing any compilation errors with your UDF? Also, there is an example UDF in the Fluent customization manual for defining viscosity. I'd encourage you to take a look at that.

please provide some more information so we can help you better.

thanks.

Best,

Karthik