Rob
Ansys Employee

It's a non standard macro, and unfortunately isn't in DOC. Fortunately it's in here:


https://www.researchgate.net/publication/275647948_Disinfection_and_advanced_oxidation_of_highly_absorbing_fluids_by_UVVUV_light_process_modeling_and_validation


Which makes it public domain.  I'll leave you to read the thesis: it's a storage macro that you're after.