[Mohammad_Jamali]

Hi
i am new be In udf Writing , recently after reading ansys lectures about udf writing some question come in mind !
1: what is different between Macro UDF and C programming UDF Structure ,
for example if i write code in C programming, should use Fluent Function Such
C_R(C,t) For define density or could another type ?

2:if i use fluent function in C programming udf structure how define Fluent library to compiler ?

Thank you for respond and help