Before revision: Notice that the quantity , often referred to as the Darcy flux or Darcy velocity, is not the velocity at which the fluid is travelling through the pores.
After revision: In case of an anisotropic porous media, the permeability is a second order tensor, and in tensor notation one can write the more general law:Notice that the quantity , often referred to as the Darcy flux or Darcy velocity, is not the velocity at which the fluid is travelling through the pores.