mfix problem
 

dear all
I´m use MFIX code (Multiphase Flows with Interphase eXchanges) for to simulate a gas-solid flows in a fluidized bed.
i was confused by following subroutines in dem part:
cell_near_wall.f
wallfacecontact.f
walledgecontact.f
wallnodecontact.f
none of above four was called by other subroutines but in *.make file.
how to call them if i want to use these subroutines?