[gomugom]

I am not familiar with ansys so it keeps getting error.
I am going to make simulation about winecellar.
I want to change inlet velocity according to other plane temperature.
But 'Divergence detected in AMG solver: temperature' appears
please
#include "udf.h"

DEFINE_ADJUST(center_temp,domain)
{

real A[2];
real temper;
int ID=12;
Thread *t;
face_t f;

t = Lookup_Thread(domain,ID);
begin_f_loop(f,t)
{
F_CENTROID(A,f,t);
temper = F_T(f,t);

}
end_f_loop(f,t)
F_UDMI(f,t,0) = temper;
}

DEFINE_PROFILE(inlet_y_velocity, t, i)
{
real y[ND_ND];
face_t f;
real current_time;
current_time=CURRENT_TIME;
begin_f_loop(f,t)
{

if(current_time>1 && F_UDMI(f,t,0)>290)
F_PROFILE(f,t,i)=8;
else if (current_time>1 && F_UDMI(f,t,0)<288 && F_UDMI(f,t,0)>200)
F_PROFILE(f,t,i)=0.1;
else if (current_time>1 && F_UDMI(f,t,0)<=290 && F_UDMI(f,t,0)>=288)
F_PROFILE(f,t,i)=4;

}
end_f_loop(f,t)
}

[pakk]

This UDF does not change temperature. It only reads the temperature from the simulation.

You simulation complains it has a problem with temperature. I don't see how this UDF can cause this. Does it also happen if you don't use this UDF, but a simpler velocity boundary condition?

[gomugom]

Originally Posted by pakk

This UDF does not change temperature. It only reads the temperature from the simulation.

You simulation complains it has a problem with temperature. I don't see how this UDF can cause this. Does it also happen if you don't use this UDF, but a simpler velocity boundary condition?

I made a room which changes temperature according to outside temperature.
No using constant velocity did not make any problem.