[GAOXL]

hello, everyone, Im trying to write a UDF for heat transfer coefficient(htc) in porous medien in Fluent, the htc is dependent in Re and Pr. I'v read the User guide, but im a little confused. Iv used the function DEFINE_PROPERTY, but there is a error: chip-exac: htc: wrong return type:void udf function expected
i think maybe iv used the wrong function type DEFINE_PROPERTY. would someone tell me, which function type should i use? and if you have done this before, i will be grateful if you put your code here. Thank you so much!!!

DEFINE_PROPERTY(htc,c,t)
{
real h;
real Rep;
real dp;
real Cp;
real k;
real vi;
real Pr;
real nu;
k= C_K_L(c,t);
dp=0.000141258;
vi=sqrt(C_U(c,t)*C_U(c,t)+C_W(c,t)*C_W(c,t)+C_V(c, t)*C_V(c,t));
Pr=C_CP(c,t)*C_MU_L(c,t)/ k;
Rep=C_R(c,t) * vi * dp / C_MU_L(c,t);
nu = 2. + 1.1*pow(Rep,0.6)*pow(Pr,1./3.);
h=k * nu / dp;
return h;
}

[sh.a.ghafour]

Dear GAOXL,
i encountered the same error when i used the TRANSIRNT_PROFILE to define the heat transfer coefficient in the porous media.
did you reach to a solution for this error??????