[hami9293]

Hello every body
as a amateur user of fluent i have a problem
when i want to define multiple udf in my case file, my last defined udfs disappeared.
How can use multiple udfs in one case file?

thank you.

[Goldsstean]

Write all the udf inside same header file for e.g

#include "udf.h"

DEFINE_PROPERTY(prop, c, t)
{

}

DEFINE_ON_DEMAND(ondemand)
{

}

So on...

[hami9293]

#include "udf.h"
my udf is so:

DEFINE_PROFILE(inlet, thread, position)

{
real pi = 3.1459 ;
real P0 = 11208 ;

face_t f;
real t = CURRENT_TIME;

begin_f_loop(f, thread)
{
t = t - floor(t) ;
if ( t>=0.5 )
F_PROFILE(f, thread, position) = P0*sin(pi*t);
else
F_PROFILE(f, thread, position) = P0*(1.5 - 0.5*cos(2*pi(t-0.5)));
}
end_f_loop(f, thread)

}
should i change it ?

[Goldsstean]

Could you explain what you want to do.

[hami9293]

I have a pipe that has one inlet and four outlet.
the boundary condition for the inlet and outlet in transient pressure.
my udf is this transient pressure.
now when I interpret the pressure that is used for e.g. out 2 the last interpreted udfs has disappeared.

[Goldsstean]

Correct me if im wrong, you would like to give profile to inlet and outlet too. then this udf will not work write separate udf.

If not try to compile and hook.

[hami9293]

let me explain more.

I have 5 different udfs for five boundaries . when i define e.g the third one , the two last defined udfs disappeared . ( i mean when i want to specify the boundary condition of the boundaries instead of 5 different udf i just have one .)

[Goldsstean]

Where are the five udf above only you are showing one?

If you have five udf means write in same file.

[hami9293]

there are almost the same with a few differences in the formula of the pressure . I have written the first udf that is for inlet

[Goldsstean]

Yes exactly, the whatever answer i have given first that is true.

Put all udf in same file.c ok

[Goldsstean]

For eg

#include "udf.h"

DEFINE_PROFILE(inlet1, thread, position)

{
your programe;
}

DEFINE_PROFILE(inlet2, thread, position)

{
your programe;
}

DEFINE_PROFILE(inlet3, thread, position)

{
your programe;
}
DEFINE_PROFILE(inlet4, thread, position)

{
your programe;
}
DEFINE_PROFILE(inlet5, thread, position)

{
your programe;
}


Save the file and interprete you will see all the profile and select respectively for the inlet.

ok thanks I have work c u

[hami9293]

Thank your lucky stars.
Really thank you for your kind helps .
c u later.