UDF is not being executed?
I am trying to model a particle surface reaction, and i have activated this via the species model (see below). For this reaction, I am using the DEFINE_PR_RATE type UDF which I have hooked. Also, I have disabled the coupled heat-mass solution in the discrete phase model dialog box, as suggested in the manual. However, when doing a discrete phase iteration the UDF is not executed somehow. What is causing this?