Hooking a UDF
 

Hi,

I'm trying to simulate two-phase flow (gas-solid) with combustion. I wrote UDF to determine the molecular weight of gas. I used the macro DEFINE_PROPERTY(M_gas,c,t). I don't know how to hook this udf !!!. I tried to hook it from material property panel but i can't. does anyone know how to proceed? please help me.

thanks.