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-   -   FLUENT UDF in Intepreting (http://www.cfd-online.com/Forums/fluent-udf/88454-fluent-udf-intepreting.html)

NGH May 17, 2011 21:41

FLUENT UDF in Intepreting
 
Hi

I have created a vel.c file for parabolic velocity BC at the inlet. The UDF.c is as shown below. During intepreting by the fluent, it has a syntax error at line 2. However, I dont find anything wrong with line 2. Anyone out there see the source of this syntax error, please help thanks

#include "udf.h"
DEFINE_PROFILE (inlet_x_velocity, thread, index) /*line 2*/
{
real x[ND_ND];
real y;
face_t f;

begin_f_loop(f, thread)
{
F_CENTROID(x, f, thread);
y=x[1];
F_PROFILE(f, thread, index) = 0.4*[-0.64*(y/0.1)^6 +3.9*(y/0.1)^5 - 9.2*(y/0.1)^4 m+ 11*(y/0.1)^3 - 6.9*(y/0.1)^2];
}
end_f_loop(f, thread)
}

alighaffari May 19, 2011 03:16

Hi NGH
I have examined your udf it has no problem in line2.But its problem is in line 12. I have solved this problem and it has been interpreted properly:

#include"udf.h"
DEFINE_PROFILE (inlet_x_velocity, thread, index) /*line 2*/
{
real x[ND_ND];
real y;
face_t f;
begin_f_loop(f, thread)
{
F_CENTROID(x, f, thread);
y=x[1];
F_PROFILE(f, thread, index) = 0.4*(-0.64*pow((y/0.1),6) +3.9*pow((y/0.1),5) - 9.2*pow((y/0.1),4)+ 11*pow((y/0.1),3) - 6.9*pow((y/0.1),2));
/*line12*/
}
end_f_loop(f, thread)
}

enjoy

NGH May 19, 2011 03:49

Hi alighaffari

Thanks a lot! I will try that again.

shilpamkar July 19, 2011 05:41

problem in UDF on LINUX
 
Hey i have a same problem
the following is the UDF
It runs fine when on windows 7.
however on linux system gives me a syntax error in line 2.
Pls help me out with this.

#include "udf.h"
DEFINE_PROFILE(inlet_x_velocity, thread, nv)
{
real x[3];
real y;
face_t f;
begin_f_loop(f, thread)
{
F_CENTROID(x,f,thread);
y=x[1];
F_PROFILE(f, thread, nv) = 0.0015*(1-pow(((y-0.005)/0.005),2));
}
end_f_loop(f, thread)
}


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