“…1 In the last few years, various studies dealing with the flow of non-Newtonian fluids through porous media have been carried out. [2][3][4] The importance of porous media flows lies in the wide range of engineering applications, particularly in areas such as crude oil recovery, filtration of suspensions in polymer solutions and flow in soils. 2 One of the reasons for the complexity of the flow in porous media, is that it is neither a pure shear nor a pure elongational flow, but a complex combination of both, with a strong shear component near the particle walls and a strong extensional component away from the walls due to the converging-diverging flow paths.…”