where: - \( Q \) is the volumetric flow rate - \( k \) is the permeability of the porous medium - \( A \) is the cross-sectional area - \( \Delta P \) is the pressure drop across the medium - \( \mu \) is the viscosity of the fluid - \( L \) is the thickness of the medium
This equation essentially states that the flow rate of the fluid through a porous medium is directly proportional to the pressure drop and the permeability, and inversely proportional to the fluid's viscosity and the medium's thickness.