Managed to gain access to CFX and completed a simple geometry with an inlet, outlet and porous region present. by setting up what they label as an 'additional variable' to represent the ammonia and assigning same properties as water, I could solve the transport equation. Most importantly, i could easily set a sink for the additional variable within the porous region so could represent the down stream conc changes.
can anyone confirm this type of approach can not be handled withing solidworks flow sim?? or am i massively missing something??