Where am I supposed to go to find all the built-in DEM variables by MFIX that could be used in user defined function?

MFiX How to
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#1

I’ll be writing a udf of the reaction rate for a DEM simulation. But I need to use some particle-related variables like the mass of one single particle at the initial moment and current moment when writing the code of this udf, I guess this kind of variable may be called DES_MASS or something like this, I am not sure if it’s really called this name. So where should I go to look up all this kind of variables predefined in MFIX?

#2

Have a look at the file model/physprop_mod.f

#3

Thanks a lot for your reply!