porous permeability
 

hi
in my model i have a porous domain and i want to change the pearmibility of porous domain by an equation that relate rate of permeability change to flow rate.and at end i want to check the flow rate.but when i want to do a time study the flow rate change so much from one time step to another.i attach the relation .please guide me. im so confused.

what are you asking..... Is there a question in there? Now I'm so confused