[aronsyu]

Hello every one

I tried to store y-direction gradient using UDS but fail.

when I interpreted UDF , fluent returns an error message

"Error: C:/Users/USER/AppData/Local/Temp/12_2.c.5332.6.c: line 81: subscripted expression is not an array or pointer: float."

Thanks for your help, I am much obliged to you.



Here is the part of my UDF code below , if I delete line 81, then every goes perfect.

-----------------------------------------------

DEFINE_ADJUST(adjust_gradient, domain)
{
Thread *t;
cell_t c;
face_t f;
domain = Get_Domain(domain_ID);
/* Fill UDS with the variable. */

thread_loop_c (t,domain)
{
begin_c_loop (c,t)

{
C_UDSI(c,t,0) = C_VOF(c,t);
}

end_c_loop (c,t)
}


thread_loop_f (t,domain)
{
if (THREAD_STORAGE(t,SV_UDS_I(0))!=NULL)
begin_f_loop (f,t)

{
F_UDSI(f,t,0) = F_VOF(f,t);
}

end_f_loop (f,t)
}
}

DEFINE_ON_DEMAND(store_gradient)
{
Domain *domain;
cell_t c;
Thread *t;
domain=Get_Domain(1); /* Fill the UDM with magnitude of gradient. */

thread_loop_c (t,domain)
{
begin_c_loop (c,t)
{
C_UDMI(c,t,gvof) = NV_MAG(C_UDSI_G(c,t,0));
C_UDMI(c,t,ygvof) = NV_MAG(C_UDSI_G(c,t,0)[1]);
/* here is line 81 */
/* I chenged line 81 like "C_UDMI(c,t,ygvof) = C_UDSI_G(c,t,0)[1];"*/
/* and interpreted success but after I Execute on Demand, fluent returns a MPI error message*/
}
end_c_loop (c,t)
}
}

---------------------------------

[Bruno Machado]

C_UDMI(c,t,ygvof) = NV_MAG(C_UDSI_G(c,t,0)[1]);

This line gives you the magnitude of the gradient in Y direction, which does not make much sense. If you want the gradient in Y direction, use

C_UDMI(c,t,ygvof) = C_UDSI_G(c,t,0)[1];

[aronsyu]

Originally Posted by Bruno Machado

C_UDMI(c,t,ygvof) = NV_MAG(C_UDSI_G(c,t,0)[1]);

This line gives you the magnitude of the gradient in Y direction, which does not make much sense. If you want the gradient in Y direction, use

C_UDMI(c,t,ygvof) = C_UDSI_G(c,t,0)[1];

Thank you ,

When I changed

C_UDMI(c,t,ygvof) =NV_MAG( C_UDSI_G(c,t,0)[1]);

to

C_UDMI(c,t,ygvof) = C_UDSI_G(c,t,0)[1];

fluent returns MPI error message

I really don't know what's wrong with my UDF code....

[pakk]

Try to compile. Compiling is 100 times better than interpreting.

[aronsyu]

Thank you, but compile/interpreted won't bring this problem.

[aronsyu]

Originally Posted by Bruno Machado

C_UDMI(c,t,ygvof) = NV_MAG(C_UDSI_G(c,t,0)[1]);

This line gives you the magnitude of the gradient in Y direction, which does not make much sense. If you want the gradient in Y direction, use

C_UDMI(c,t,ygvof) = C_UDSI_G(c,t,0)[1];

I solve this problem finally.

The problem happened cause I FORGOT RETURN MY CALCULATION