[sazabi2001]

Hi:

I'm quite new to OpenFOAM so I still having problem with the porous media setting.

1: I notice that there're some 'porous' solvers like rhoPorousSimpleFoam and set the porosityPorperties in the /constant folder, and some other solvers like rhoSimpleFoam can set the porous media in the fvOption. Are they the same? or rhoPorousSimpleFoam will do better in solving the same problem?

2: I have not idea how to set / use the porosity value in the solver. I read the PorousZone.h and PorousZone.c, it seems in (or before) OF 2.2 the porosity value is not in use. and from OF 2.4 on I can't find the PorousZone.h and PorousZone.c anymore, instead there is porousModel folder included porousModel.h and porousModel .c, also the some other think like DarcyForchheimer.h and DarcyForchheimer.c. I don't seem anything related to porosity value setting. Can anybody tell me where to find the definition of porosity in the solver files? Or how can I set the porosity in the solver and see the velocity changes accordingly?

3: I heard that the porosity is recognized by the time derivative term of some solvers (something like fvm::ddt(U) ?), but I still can't find or proof this. Also if the porosity only use in the time derivative term but not the convection term, that sounds strange too.