1 Reply Latest reply on Aug 11, 2011 6:42 AM by Sophie John

    help regarding concentration change in porous regions

    Sophie John

      Hi all,


      For my dissertation I'm modelling flow through wetlands. Objectives include evaluating positioning and type of reeds - ammonia concentration and pressure drop being the main methods of comparison. I've reduced the complexity of the problem by assuming porous regions for the reeds.


      In short, ammonia levels deplete within the reed beds. Hence I'd like to include this source within the model. Is it possible for me to apply a negative mass source with respect to ammonia and positive source (of same magnitude) hence representing the change in composition within these regions?


      Im very new to SWX Flow Sim. If anyone can help or suggest an alternative way of modelling this it would be much appreciated.





        • Re: help regarding concentration change in porous regions
          Sophie John

          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??