[franc1]

Hi everybody
I'm new to c language, i'm writing this udf to have this specific heatflux profile, depending on the temperature of the wall. It has to be updated each time-step also, since temperature at the wall is changing during time.

After solving some syntax errors now i have the following error in the ansys console:
c(23): error C2064: term does not evaluate to a function taking 337 arguments

#include "udf.h"

DEFINE_PROFILE(wallheatflux,t,i)

{
 face_t f;

 real temp;
 temp = F_T(f,t);
 real cp1=4180;
 real cp2=3488.3;
 real Tsat=373;
 real Tliq=293;
 real Ql=2257000;
 real flow_time = RP_Get_Real("flow-time");

 begin_f_loop (f,t)
{
 if(temp>373)
 F_PROFILE(f,t,i) = -1.2099*(cp1*(Tsat-Tliq)+Ql+cp2*(temp-Tsat));
 
 elseif(temp<=373)
 F_PROFILE(f,t,i) = -1.2099*(cp1*(temp-Tliq));
}
 end_f_loop (f,t)
}

How can i solve it?
Thank you in advance!

[vinerm]

f does not exist outside f_loop. Fluent provides its value only within the loop. Hence, F_T has to be inside the loop. That's the bug. Secondly, do not use RP_ call. This is expensive in terms of time and should be used only if really needed. Use CURRENT_TIME; this is C variable defined within Fluent and is equal to current time.

[franc1]

I modified it in this way, but the error is the same.

#include "udf.h"

DEFINE_PROFILE(wallheatflux,t,i)

{
 face_t f;

 real cp1=4180;
 real cp2=3488.3;
 real Tsat=373;
 real Tliq=293;
 real Ql=2257000;
 real time = CURRENT_TIME;

 begin_f_loop (f,t)
{
 real temp = F_T(f,t);
 if(temp>373)
 F_PROFILE(f,t,i) = -1.2099*(cp1*(Tsat-Tliq)+Ql+cp2*(temp-Tsat));
 
 elseif(temp<=373)
 F_PROFILE(f,t,i) = -1.2099*(cp1*(temp-Tliq));
}
 end_f_loop (f,t)
}

[vinerm]

Try to compile or interpret the attached file

[franc1]

Where do you write the codes? Which programme is this?

The code compile very well, you solve my problem again vinerm. Thank you a lot!

[vinerm]

You can use any editor. I use vi but it does not really matter as long as you save it in a proper format. If you use Windows, prefer using textpad or notepad++.