/********************** UDF for x-variable thermal conductivity (IWT CC) ************************/ #include "udf.h" DEFINE_PROPERTY(ThConducvitiy_Insulation, c, t) { real lambda_D; real x_cell[ND_ND]; C_CENTROID(x_cell,c,t); if (x_cell[0]>1.7) { lambda_D = 1.2; } else lambda_D = 0.1; return lambda_D; }