Fluids

Fluids

How to Set Confining Pressure Boundary Condition in a porous Media

    • ballisticme
      Subscriber

      Dear All,


      I am trying to simulate a porous media system in either Fluent or CFX and need to impose a "Confining pressure" and "pore Pressure" in the simulation. My efforts so are:


      1. pore pressure can be imposed by giving a pressure outlet condition. (Not too sure though).


      2. trying the confining pressure; in Fluent I did not get any headway but in CFX I see stuff like "opening pressure and direction" as a way of adding pressure to the wall but I am not sure if this is correct.


      Please, I need help on this and have attached the domain here.


       


      Thanks,


      Yaqub



       

    • DrAmine
      Ansys Employee

      Does it mean that the whole system is under the same pressure?  What about using that pressure as pressure datum (operating pressure)?

    • ballisticme
      Subscriber

      Dear Amine,


      Thanks for responding.


      As much as I know and tried, using the operating pressure doesn't work.


      It is like a petroleum reservoir where the reservoir (porous media) is pressurized within and the overlying formations exert some pressure on the reservoir block of which the difference gives the effective stress. 


      I need to impose that confining pressure on the porous block


       


      Thanks,


      Yaqub

    • Karthik R
      Administrator

      Hello,


      Is confining pressure preventing the flow? How is it different t from pore pressure? Would you expect the fluid to flow from the boundaries where you are applying confining pressure?


      Best,


      Karthik

    • ballisticme
      Subscriber

      Dear Karthik,


      No, it does not prevent the flow.


      Fluid would still flow from the inlet (higher pressure) to the outlet (lower pressure) region. In a porous media, the confining pressure tends to affect the material property by reducing/altering the porosity and or permeability while fluid still flows from inlet to outlet. That is how a typical petroleum reservoir works.


       


      Thanks,


      Yakubu 

Viewing 4 reply threads
  • You must be logged in to reply to this topic.