[panasonic18]

Hey,



i've real big problem using an UDF for velocity inlet and can't solve it. It's a Mesh over an Airfoil created with ANSYS ICEM 15.0. When i load the Mesh into FLUENT 15.0 everything is fine, no errors.



Hybrid Initialisation is well without using the UDF, so no Errors without using the UDF.



But when i want to implement the UDF and press Hybrid Initialisation, FLUENT says this:



Error: %prf-set-var: invalid flonum
Error Object: -1.#ind


I can't figure out, where the problem is. Also never heard this error before and searching via google wasn't succesfull. So maybe someone coul help me? Here my defined UDF:




#include "udf.h"

#define c_max 30.88 // unit m/s
#define delta 0.04
DEFINE_PROFILE(inlet_velocity, t, i)
{
real x[3];
real y;
face_t f;

begin_f_loop(f,t)
{
F_CENTROID(x,f,t);
y = x[2];

if(x[2] <delta)

F_PROFILE(f,t,i) = c_max * pow(x[2]/delta, 0.2);

else

F_PROFILE(f,t,i) = c_max;
}
end_f_loop(f,t)

}


I appreciate every kind of help.



Best regards