October 8, 2018 at 4:42 pmballisticmeSubscriber
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.
October 8, 2018 at 6:24 pmDrAmineAnsys Employee
Does it mean that the whole system is under the same pressure? What about using that pressure as pressure datum (operating pressure)?
October 8, 2018 at 6:48 pmballisticmeSubscriber
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
October 9, 2018 at 1:39 amKarthik RAdministrator
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?
October 9, 2018 at 4:57 pmballisticmeSubscriber
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.
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