[azueter]

Hello all

I am still new to DEFINE_ON_DEMAND macro and I am trying to learn it first using simple problems. I am modeling flow inside a tube exposed to heat flux. Right now, I am trying to find the average wall temperature at the outlet. Here is the code:

------------------------------------------
#include "udf.h"
DEFINE_ON_DEMAND(get_temperature)
{
Domain *d; /*Declare the fluid domain pointer*/
d = Get_Domain(1);
int IDo=9; /*Zone Number (Thread No.) of Outlet*/
Thread *to; /*Declare Outlet Thread*/
face_t f; /*Declare f as face (this will be used in looping*/
to=Lookup_Thread(d,IDo); /*Find Outlet boundary thread location*/
real Too; /*Mean Outlet T*/
real Tfo; /*To be used as below/*
/*Sum of T*/
real TfoT=0; /*Used to calculate total T*/
real A[ND_ND];
real area; /*area of each face*/
real areaT=0; /*used to calculate total area*/
begin_f_loop(f,to)
{
F_AREA(A,f,to); /*the output of this func is A (which is calculated as vector in fluent)*/
area=NV_MAG(A); /*Find the value of A*/
Tfo=F_T(f,to)*area; /*Find the weighted temperature at each face*/
areaT=areaT+area;
TfoT=TfoT+Tfo;
}
end_f_loop(f,to)
Too=TfoT/areaT;
printf("outlet_temp= %f", Too);
F_UDMI(f,to,5)=Too;
}
------------------------------------------

It is compiled successfully and I am able to see the the function under "execute demand window". However, when execute it, nothing happens and the value of F_UDMI(f,to,5) does not change.

However, I should mention that after compiling, I get this message (note the highlighted):

-----------------------------------------------
Copied C:\Users\TEMP.HW.000\Desktop\SecondNanoTrySaveLast Try.c to sdfsdfge\src
Creating user_nt.udf file for 3d ...
(system "copy "C:\PROGRA~1\ANSYSI~1\v150\fluent"\fluent15.0.7\sr c\makefile_nt.udf "sdfsdfge\win64\3d\makefile" ")
1 file(s) copied.
(chdir "sdfsdfge")(chdir "win64\3d")# Generating ud_io1.h
SecondNanoTrySaveLastTry.c
# Generating udf_names.c because of makefile SecondNanoTrySaveLastTry.obj
udf_names.c
udf_names.c(9) : warning C4113: 'void (*)()' differs in parameter lists from 'void (*)(void)'
# Linking libudf.dll because of makefile user_nt.udf udf_names.obj SecondNanoTrySaveLastTry.obj
Microsoft (R) Incremental Linker Version 12.00.21005.1
Copyright (C) Microsoft Corporation. All rights reserved.

Creating library libudf.lib and object libudf.exp
Done

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

When I try to interpret, the following errors occur:

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

Error: C:\\Users\\TEMP.HW.000\\Desktop\\SecondNanoTrySave LastTry.c: line 6: parse error.
Error: C:\\Users\\TEMP.HW.000\\Desktop\\SecondNanoTrySave LastTry.c: line 7: parse error.
Error: C:\\Users\\TEMP.HW.000\\Desktop\\SecondNanoTrySave LastTry.c: line 8: parse error.
Error: C:\\Users\\TEMP.HW.000\\Desktop\\SecondNanoTrySave LastTry.c: line 9: to: undeclared variable

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

Any help is really appreciated