[antariksh]

Hello,

Please look into following UDF

#include "udf.h"
real ts1_temp;
DEFINE_EXECUTE_AT_END(temp1)
{
real ts1_coordinate[ND_ND];
real x1,y1,z1;
cell_t c;
Domain *d;
Thread *t;
x1=0.020;
y1=0.0075;
z1=0.0;
d=Get_Domain(2);
thread_loop_c(t,d)
{
begin_c_loop(c,t)
{
C_CENTROID(ts1_coordinate,c,t);
x1=ts1_coordinate[0];
y1=ts1_coordinate[1];
z1=ts1_coordinate[2];
ts1_temp=C_T(c,t);
printf("temperature_1, %g/n", ts1_temp);
}
end_c_loop(c,t)
}
}

This UDF is being interpreted successfully but upon start of simulation fluent is giving error
Error: received a fatal signal (Segmentation fault).
Error Object: #f

Please help in resolving this problem

[D.M]

Hi
you should write the line "real ts1_temp" in the main body of your code, not out of it, or if you still want to write it there (out of the body), use static real instead of real.
the error "segmentation fault" usually happens because of a not identified parameter in the code.
let me know if it solved your problem or not.

[antariksh]

Dear Davoud,

Thanks for your reply.
I tried after changing to "static real" instead of "real"
But now while interpreting the UDF fluent is showing parse error in the line of static real ts1_temp.

Please help me with some solution.

[NiteshNaik]

hi,

I am new to UDF. can anyone please help me write a udf for the plot shown in the attachment. please help. My mail ID, nitesh_n@hotmail.com. Will be grateful
Plot.jpg

[D.M]

#include "udf.h"

DEFINE_EXECUTE_AT_END(temp1)
{
real ts1_temp;
real ts1_coordinate[ND_ND];
real x1,y1,z1;
cell_t c;
Domain *d;
Thread *t;
x1=0.020;
y1=0.0075;
z1=0.0;
d=Get_Domain(2);
thread_loop_c(t,d)
{
begin_c_loop(c,t)
{
C_CENTROID(ts1_coordinate,c,t);
x1=ts1_coordinate[0];
y1=ts1_coordinate[1];
z1=ts1_coordinate[2];
ts1_temp=C_T(c,t);
printf("temperature_1, %g/n", ts1_temp);
}
end_c_loop(c,t)
}
}

try this , i compiled it without any errors.

[NiteshNaik]

Originally Posted by D.M

#include "udf.h"

DEFINE_EXECUTE_AT_END(temp1)
{
real ts1_temp;
real ts1_coordinate[ND_ND];
real x1,y1,z1;
cell_t c;
Domain *d;
Thread *t;
x1=0.020;
y1=0.0075;
z1=0.0;
d=Get_Domain(2);
thread_loop_c(t,d)
{
begin_c_loop(c,t)
{
C_CENTROID(ts1_coordinate,c,t);
x1=ts1_coordinate[0];
y1=ts1_coordinate[1];
z1=ts1_coordinate[2];
ts1_temp=C_T(c,t);
printf("temperature_1, %g/n", ts1_temp);
}
end_c_loop(c,t)
}
}

try this , i compiled it without any errors.

Hi DM
Thank u. My plot is velocity vs time. Wat changes r reqd? Or should I upload as it is

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