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- - **user-defined function problem**
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user-defined function problemI wrote an user-defined function. I do not know whether is it correct or not since floating error appears each time I interpret it into my model. Please have a check for me. Thanks a lot.
#include "udf.h" /* DENSITY - START */ DEFINE_PROPERTY(formic_acid_density, c, t) { real C; /* self-defined variable for convenience */ real D; /* self-defined variable for convenience */ real rho; /* calculated density in unit kg/m3 */ real T = C_T(c,t); /* temperature in unit kelvin, K */ const real A = 0.36821; /* dimensionless regression coeficient */ const real B = 0.24296; /* dimensionless regression coeficient */ const real n = 0.23663; /* dimensionless regression coeficient */ const real Tc = 580; /* critical temperature in unit kelvin, K */ C = 1-T/Tc; /* self-defined variable for convenience */ D = pow(C, n); /* self-defined variable for convenience */ rho = A*(pow(B, -D))*1000; /* calculated density in unit kg/m3 */ return rho; } |

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