[Rapha]

Hi everybody,

Could somebody please explain in a simple way how the porous zone in OpenFOAM works. From what I have gathered, I have calculated the viscous and inertial forces using equations related to the sphericity, pebble diameter and porosity of the material, which give the values for d and f, however this is a single value rather than a vector which we must provide.

For my system of a pebble bed, it is the same porosity in each direction, x, y and z. So does that mean that each of the x, y, z values in the d and f vectors are the same values as which I calculated from the equations? Or is it purely in the direction which the velocity is going?

Thanks,
Rapha