Single-phase flow, in porous media

Shear Factor, F. The shear factor F is a generalized hydrodynamic resistivity of porous media. It appears in the momentum equation 63 and is needed to solve the problem of single-phase flow in porous media. The shear factor F can be related to the pressure drop of a unidirectional flow without bounding wall effects, that is, in a one-dimensional medium through equation 21. In this section, we give a detailed account for the derivation of the expressions for fv and F. 

Hence, we have formed the closure for the single-phase flow in porous media using a model of the shear factor for both consolidated and granular media. For the term closure, we mean that the shear factor F of equation 63, which was introduced through averaging procedures, is now defined. 

---