[ASDzxc]

Hi there,
I'm doing a fluid-solid coupling heat transfer problem. Since I've just started using Fluent, I've created a very simple test case (no radiation) to figure out what Fluent can do (attachement):
1.png
Based on the description of udf DEFINE_HEAT_FLUX, it modifies the diffusive heat flux coefficients using equation:
qid = cid[0] + cid[1]*C_T(c0,t0) - cid[2]*F_T(f,t) - cid[3]*pow(F_T(f,t),4)
so I wrote the udf:
DEFINE_HEAT_FLUX(heat_flux, f, t, c0, t0, cid, cir)
{
real h=2000.;
cid[1] = h;
cid[2] = h;
cid[0] = 0.;
cid[3] = 0.;
C_UDMI(c0,t0,1)=h;
}
Then I got questions about the result, it seems really strange for me.
1. I tried to visualize C_UDMI(c0,t0,1) in the result. Instead of showing 2000 in some near wall cells, the max of the contour is somewhere around 1500 or 1000, not 2000, why?
2. What exactly this udf modified? In the figure that I uploaded,
h(T_f-T_interface)=-k_wall*(T_interface-T_wall)/d2
where h is the coefficient assigned using udf, k_wall is the wall conductivity.
is this correct?
Thanks for your help.