# Temperature dependent Heat flux (Peltier effect)

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 January 25, 2020, 03:53 #2 New Member   Join Date: Jul 2014 Posts: 26 Rep Power: 11 Hi there, Could you find the answer? I have the same problem in my project. Regards.

 January 27, 2020, 05:45 #3 Senior Member   Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34 describe your problem in details Pacific likes this. __________________ best regards ****************************** press LIKE if this message was helpful

 January 27, 2020, 05:53 #4 New Member   Join Date: Jul 2014 Posts: 26 Rep Power: 11 I should apply Q=a*I*T to the boundary condition. T is the wall temperature. How can I define it in UDF? I have tried to use Define_Heat_Flux function. Thanks for your time.

 January 27, 2020, 06:12 #5 Senior Member   Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34 show your code, describe your problems __________________ best regards ****************************** press LIKE if this message was helpful

January 27, 2020, 08:40
#6
New Member

Join Date: Jul 2014
Posts: 26
Rep Power: 11
Quote:
#include "udf.h"
real Alpha = 0.; // Seebeck coefficient (V/K)
real I=0.; // Electric current

//

{

Alpha = 0.000400;
I=5;
}
DEFINE_HEAT_FLUX(heat_flux, f, t, c0, t0, cid, cir)
{
cid[0] = 0.;
cid[1] = 0.0;
cid[2] = Alpha*I;
cid[3] = 0.;
}

 January 27, 2020, 23:05 #7 Senior Member   Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34 what problems do you have? may be you should use cid[1] = Alpha*I; I have no experience here __________________ best regards ****************************** press LIKE if this message was helpful

 January 28, 2020, 07:28 DEFINE_HEAT_FLUX vs DEFINE_PROFILE #8 Senior Member     Vinerm Join Date: Jun 2009 Location: Nederland Posts: 2,946 Blog Entries: 1 Rep Power: 35 Hi Do note that DEFINE_HEAT_FLUX is not meant for applying the heat flux condition, rather to alter the interactions between temperature and heat flux. For the purpose of applying a profile, DEFINE_PROFILE is to be used. Vinerm

February 4, 2021, 04:13
#9
New Member

ahmet kaya
Join Date: Aug 2020
Location: İzmir
Posts: 27
Rep Power: 5
Quote:
 Originally Posted by vinerm Hi Do note that DEFINE_HEAT_FLUX is not meant for applying the heat flux condition, rather to alter the interactions between temperature and heat flux. For the purpose of applying a profile, DEFINE_PROFILE is to be used. Vinerm
Hi there,

I have the same problem in my project.

Regards.

 Tags heat flux fluent udf, peltier, temperature dependent