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- - udf temperature (https://www.cfd-online.com/Forums/fluent-udf/123911-udf-temperature.html)

rayan24

September 24, 2013 04:22

udf temperature

Hi,

I want to impose a different temperature a different time, i want to impose 700K between t=0 and t=10s and T=400 K between t=10s and t=50s, can you see this udf and suggest me a correction, please?

Code:

#include "udf.h"

DEFINE_PROFILE(inlet_temperature,t,i)



{

real x[ND_ND];

real r;

face_t f;

real dt=CURRENT_TIME;

begin_f_loop(f,t)

{

F_CENTROID(x,f,t);



if ( dt <= 10)

F_PROFILE(f,t,i) =700;

}



if (10 < dt <= 50)



    F_PROFILE(f,t,i) =400;

end_f_loop(f,t)

}

kornetka

September 24, 2013 15:13

Hi,
two things I noticed:
1. Try changing the 2nd if statement into conjuction of conditions, i.e.

Code:

10 < dt && dt <= 50

2. I think that values for both cases (F_PROFILE=...) should be inside the face loop.
Hope this helps,
Regards, kornetka

rayan24

September 25, 2013 08:57

Yes! good

Thanks :)

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