[vizvaz]

Hi Everyone,

I'm trying to compile an UDF using DEFINE_PROFILE for thermal BC at wall.

My code is as below

#include "udf.h"

DEFINE_PROFILE(htcTube,t,i)
{
	cell_t c;	
	face_t f;
	
	Thread *ct; 
	
	ct=THREAD_T0(t); 
	c=F_C0(f,t);
	
	real Re, Pr, mu, muw, k, d ;								
	real rho, u, cp, h; 									
					

	begin_f_loop(f,t)
		{
			rho = C_R(c,ct); 							
			mu = C_MU_EFF(c,ct); 							
			muw = C_MU_L(c,ct);							
			k = C_K_L(c,ct); 							
			cp = C_CP(c,ct); 							
			u  = ND_MAG(C_U(c,ct),C_V(c,ct),C_W(c,ct));				
			d  = 10/1000;						             	
			
			Re = rho * u * d /mu ; 							
			Pr = cp * mu/k ;							
			h = (0.023 * pow(Re,0.8) * pow(Pr, 0.4) * pow((mu/muw),0.14))*k/d;

			F_PROFILE(f,t,i) = h ;
		}
	end_f_loop(f,t)
}

Fluent throws an error as below

(chdir "libudf")(chdir "win64\3ddp")# Generating ud_io1.h
01.c
..\..\src\01.c(50) : error C2275: 'real' : illegal use of this type as an expression
        C:\PROGRA~1\ANSYSI~1\v160\fluent\fluent16.0.0\src\main\global.h(174) : see declaration of 'real'
..\..\src\01.c(50) : error C2146: syntax error : missing ';' before identifier 'Re'
..\..\src\01.c(50) : error C2065: 'Re' : undeclared identifier
..\..\src\01.c(50) : error C2065: 'Pr' : undeclared identifier
..\..\src\01.c(50) : error C2065: 'mu' : undeclared identifier
..\..\src\01.c(50) : error C2065: 'muw' : undeclared identifier
..\..\src\01.c(50) : error C2065: 'k' : undeclared identifier
..\..\src\01.c(50) : error C2065: 'd' : undeclared identifier
..\..\src\01.c(51) : error C2275: 'real' : illegal use of this type as an expression
        C:\PROGRA~1\ANSYSI~1\v160\fluent\fluent16.0.0\src\main\global.h(174) : see declaration of 'real'
..\..\src\01.c(51) : error C2146: syntax error : missing ';' before identifier 'rho'
..\..\src\01.c(51) : error C2065: 'rho' : undeclared identifier
..\..\src\01.c(51) : error C2065: 'u' : undeclared identifier
..\..\src\01.c(51) : error C2065: 'cp' : undeclared identifier
..\..\src\01.c(51) : error C2065: 'h' : undeclared identifier
..\..\src\01.c(56) : error C2065: 'rho' : undeclared identifier
..\..\src\01.c(57) : error C2065: 'mu' : undeclared identifier
..\..\src\01.c(58) : error C2065: 'muw' : undeclared identifier
..\..\src\01.c(59) : error C2065: 'k' : undeclared identifier
..\..\src\01.c(60) : error C2065: 'cp' : undeclared identifier
..\..\src\01.c(61) : error C2065: 'u' : undeclared identifier
..\..\src\01.c(62) : error C2065: 'd' : undeclared identifier
..\..\src\01.c(64) : error C2065: 'Re' : undeclared identifier
..\..\src\01.c(64) : error C2065: 'rho' : undeclared identifier
..\..\src\01.c(64) : error C2065: 'u' : undeclared identifier
..\..\src\01.c(64) : error C2065: 'd' : undeclared identifier
..\..\src\01.c(64) : error C2065: 'mu' : undeclared identifier
..\..\src\01.c(65) : error C2065: 'Pr' : undeclared identifier
..\..\src\01.c(65) : error C2065: 'cp' : undeclared identifier
..\..\src\01.c(65) : error C2065: 'mu' : undeclared identifier
..\..\src\01.c(65) : error C2065: 'k' : undeclared identifier
..\..\src\01.c(66) : error C2065: 'h' : undeclared identifier
..\..\src\01.c(66) : error C2065: 'Re' : undeclared identifier
..\..\src\01.c(66) : error C2065: 'Pr' : undeclared identifier
..\..\src\01.c(66) : error C2065: 'mu' : undeclared identifier
..\..\src\01.c(66) : error C2065: 'muw' : undeclared identifier
..\..\src\01.c(66) : error C2065: 'k' : undeclared identifier
..\..\src\01.c(66) : error C2065: 'd' : undeclared identifier
..\..\src\01.c(68) : error C2065: 'h' : undeclared identifier

Done.

It would be really helpful. If any of you could help solve this issue.

Thanks in Advance.

[KevinZ09]

My first suggestion would be to try putting your real declarions before the ct and c expressions.

[pakk]

I completely agree with Kevin.

My second suggestion: the line

d  = 10/1000;

probably does not do what you expect. d will not be 0.01, because integer division will be used.
Instead, use one of the following:

d  = 10./1000;
d  = 10/1000.;
d = 0.01;
d = (float)10/1000;

Choose whatever is more easy to understand for you six months from now.