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Temperature dependent Heat flux (Peltier effect)

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Old   February 8, 2013, 05:12
Default Temperature dependent Heat flux (Peltier effect)
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Daniel
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I'm a student who have to design a cooling system based on Peltier module for my final degree project.
I have tried to develop a UDF which takes the temperature for one face and applies it in the face where the UDF is applied. I am able to retrieve the information of the face where the UDF is applied but not from the other face.
IŽll post my UDF to see if anyone see where is the problem.

#include "udf.h"

DEFINE_PROFILE(peltier, thread, i)

{
real sum = 0.;
real temp_sum = 0.;
real tmin = 0.;
real tempe,media;
face_t f;

Thread *f_thread;
Domain *domain;
domain = Get_Domain(2);
thread_loop_f(f_thread, domain)
{

begin_f_loop(f, f_thread)
{
tempe=F_T(f,f_thread);
sum=sum+1;
temp_sum=temp_sum+tempe;
}
end_f_loop(f, f_thread)


}
media=temp_sum/sum;
printf("media: %d", media);
begin_f_loop(f, thread)
{
F_PROFILE(f, thread,i) = 0.;
}
end_f_loop(f, thread)
}


Any advice are welcome.
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Old   January 25, 2020, 04:53
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Hi there,


Could you find the answer?
I have the same problem in my project.


Regards.
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Old   January 27, 2020, 06:45
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describe your problem in details
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Old   January 27, 2020, 06:53
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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.
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Old   January 27, 2020, 07:12
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show your code, describe your problems
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Old   January 27, 2020, 09:40
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Quote:
Originally Posted by AlexanderZ View Post
show your code, describe your problems
#include "udf.h"
real Alpha = 0.; // Seebeck coefficient (V/K)
real I=0.; // Electric current

//

DEFINE_ADJUST(Seebeck_adjust, domain)
{

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.;
}
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Old   January 28, 2020, 00:05
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what problems do you have?
may be you should use cid[1] = Alpha*I;
I have no experience here
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Old   January 28, 2020, 08:28
Default DEFINE_HEAT_FLUX vs DEFINE_PROFILE
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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.

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Old   February 4, 2021, 05:13
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Quote:
Originally Posted by vinerm View Post
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,


Could you find the answer?
I have the same problem in my project.


Regards.
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