Who can tell me what is the meaning of the macro in fluent UDF:C_PREMIXC_RATE(c,t)
 

hello, everybody.
Who can tell me the meaning of the macro in fluent UDF, in the src folder you can find a sg_mem.h, in which a lot of macro exist. For example, C_PREMIXC_AP(c,t),C_PREMIXC_S(c,t),and C_PREMIXC_RATE(c,t).
But i can not exactlly know the meaning of those, i.e., which physical variable can be represented by them?
Any help will be very thankfull.

Hi, did you solve this problem?
I also wanna know the meaning of C_PREMIXC_AP, C_PREMIXC_S, C_PREMIXC_RATE and the way to use them.