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heat transfer coefficient for the fluid / solid interface |
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July 7, 2014, 23:38 |
heat transfer coefficient for the fluid / solid interface
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Member
sarah
Join Date: Aug 2010
Posts: 42
Rep Power: 15 |
Hi,
I am using non-equilibrium model in porous zone in Ansys Fluent 14.5. for specifying heat transfer coefficient for the fluid / solid interface, I have written the following udf #include "udf.h" DEFINE_PROFILE(Heat_trans_coeff,t,i) { cell_t c; real Nu,Re,Pr; real dens, visc; /*Fluid*/ real cond, cp; /* Fluid*/ real d_p; real por;/*Porosity of the bed*/ d_p=0.06; por=0.36 begin_c_loop(c,t) { dens = C_R(c,t); /*Density of fluid*/ visc = C_MU_L(c,t); /*Viscosity fluid*/ cond = C_K_L(c,t); /*Conductivity fluid*/ cp = C_CP(c,t); /*Specific heat fluid*/ Re = ND_MAG(C_U(c,t),C_V(c,t),C_W(c,t))*d_p*dens*por/visc ; /*Reynolds number has been calculated based on pore velocity*/ Pr = cp*visc/cond ; Nu = 2.+ 1.1 * pow(Re,0.6) * pow(Pr,1./3.); F_PROFILE(c,t,i) = Nu*cond/d_p ; } end_c_loop(c,t) } However this code cannot be interpreted in FLUENT. The error message is "c_loop_last: undeclared variable" I would be grateful if somebody help me! |
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