October 19, 2023 at 11:21 amRobbie CrosbySubscriber
I am trying to edit the value of the heat transfer coefficient under heat transfer settings for a Non-equilibrium thermal model in porous media. I am trying to write a UDF to do this however I cant get my UDF to come up when compiled. Does anyone have any advice for where I am going wrong. Thank you.
#define Tsolidus 300.0
#define Tliquidus 304.0
#define L_f 250 //Latent heat of fusion
#define UDM_RHO_F_PREV 0 // UDM index for storing previous rho_f
#define UDM_LAMBDA_PREV 1 // UDM index for storing previous lambda
DEFINE_PROFILE(h_sfq, c, t)
real dl, epsilon, mu, nu, pr, rho_pcm, u, v, mu_pcm, k_pcm, Re_d, h_sfq, local_h_sfq;
dl = 0.0194; //Diameter Matlab
epsilon = 0.85; //Porosity Matlab
mu = C_MU_L(c, t); // Laminar viscosity
rho_pcm = C_R(c, t); // Density
nu = mu/rho_pcm; // Kinematic Viscosity
pr = nu/rng_alpha(1., mu, mu); // Prandtl Number
u = C_U(c, t);
v = C_V(c, t);
mu_pcm = C_MU_L(c ,t);
k_pcm = C_K_L(c, t);
Re_d = (rho_pcm * sqrt(u*u + v*v) *dl) / (epsilon * mu_pcm);
if (Re_d > 0 && Re_d <= 40)
local_h_sfq = (0.76 * pow(Re_d, 0.4) * pow(pr, 0.37) * k_pcm)/dl;
else if (Re_d > 40 && Re_d <= 1000)
local_h_sfq = (0.52 * pow(Re_d, 0.5) * pow(pr, 0.37) * k_pcm)/dl;
else if (Re_d > 1000 && Re_d <= 20000)
local_h_sfq = (0.26 * pow(Re_d, 0.6) * pow(pr, 0.37) * k_pcm)/dl;
October 20, 2023 at 5:15 pmFederico Alzamora PrevitaliAnsys Employee
Are you having problems to get this to compile? Or is the UDF not working?
If the former, are you getting any error/warning messages when you try to compile?
If the second, I would look at the last section of your code, where you return the value of local_h_sfq only in the last else statement
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