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Old   November 30, 2021, 18:16
Default temperature sensor
  #1
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Erfan
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Hello dear friends
I have a problem in which there's a solid and a pipe is on top of it with water flow. I want to write a UDF which changes the water inlet velocity corresponding to the temperature of a specific location of the solid. I'll be thankful if you help me with this frustrating problem. I've written this UDF which needs to be corrected.
Code:
DEFINE_PROFILE(InletVelocity, t, i)
{

face_t f;
begin_f_loop (f,t)
{
        real temp=0.;
	real thermosensor_coordinate[ND_ND];
	cell_t c;
	Domain *d;
	Thread *t;
	d = Get_Domain(1);
	real xmin=0.0049215709;
 	real ymin=-0.049582131;
 	real zmin=-0.028587651;
	real tmax=0.;
	real x,y,z;	
        temp=C_T(c,t);
	if (temp>=305 && temp<=315)
		F_PROFILE(f,t,i) = 5;
	else if (temp>315)
		F_PROFILE(f,t,i) = 10;
	else
		F_PROFILE(f,t,i) = 1;
}
end_f_loop(f,t)
}
thanks in advance
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Old   November 30, 2021, 23:47
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Alexander
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compile code
Code:
DEFINE_PROFILE(InletVelocity, t, i)
{
cell_t c;
CX_Cell_Id cx_cell;
Thread *t;
face_t f;
real NV_VEC(pt);
real tmax=0.;
real temp=0.;
NV_D(pt, =, 0.0049215709, -0.049582131, -0.028587651);
CX_Start_ND_Point_Search();
cx_cell=*CX_Find_Cell_With_Point(pt);
CX_End_ND_Point_Search();
c = RP_CELL(&cx_cell); //the right cell number
t = RP_THREAD(&cx_cell); // the thread
temp=C_T(c,t);
begin_f_loop (f,t)
{
	if (temp>=305 && temp<=315)
		F_PROFILE(f,t,i) = 5;
	else if (temp>315)
		F_PROFILE(f,t,i) = 10;
	else
		F_PROFILE(f,t,i) = 1;
}
end_f_loop(f,t)
}
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Old   December 1, 2021, 05:15
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Erfan
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thank you but these errors have occurred during compiling:
Code:
warning: cast to 'void * __ptr32' from smaller integer type 'unsigned long' [-Wint-to-void-pointer-cast]
    return((void * POINTER_32) (unsigned long) (ULONG_PTR) p);

warning: incompatible redeclaration of library function 'strncasecmp' [-Wincompatible-library-redeclaration]
int strncasecmp (const char *, const char *, int);

note: 'strncasecmp' is a builtin with type 'int (const char *, const char *, unsigned long long)'

fatal error: 'ud_io1.h' file not found
#  include "ud_io1.h"
thank you
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Old   December 3, 2021, 02:59
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Alexander
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compile code
Code:
#include "udf.h"
#include "cxndsearch.h"

DEFINE_PROFILE(InletVelocity, t, i)
{
static ND_Search *domain_table=NULL;
cell_t c;
CX_Cell_Id cx_cell;
Thread *tc;
face_t f;
real NV_VEC(pt);
real tmax=0.;
real temp=0.;
NV_D(pt, =, 0.0049215709, -0.049582131, -0.028587651);

domain_table = CX_Start_ND_Point_Search( domain_table,TRUE,-1);
cx_cell = *CX_Find_Cell_With_Point(domain_table,pt,0.0);
domain_table=CX_End_ND_Point_Search(domain_table);

c = RP_CELL(&cx_cell); //the right cell number
tc = RP_THREAD(&cx_cell); // the thread
temp=C_T(c,tc);
begin_f_loop (f,t)
{
	if (temp>=305 && temp<=315)
		F_PROFILE(f,t,i) = 5;
	else if (temp>315)
		F_PROFILE(f,t,i) = 10;
	else
		F_PROFILE(f,t,i) = 1;
}
end_f_loop(f,t)
}
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Old   December 4, 2021, 14:57
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Erfan
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thank you
Now I have a new problem with this UDF. When I compile this and apply it to the velocity, this message is showed and the fluent suddenly closed.

do you know what's wrong? and as I really have a problem with compiled UDF. Can I change this UDF in a way to be used as an interpreted UDF?
thanks a lot, and sorry for asking a lot of questions.
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