Abstract: The velocity variation within the porous medium depends on the structure of the packed bed. This behaviour exhibits hydrodynamic mixing at the pore scale. The pressure drops occurring across the porous medium is attributed to several factors, including form drag, viscous drag from bounding wall and inertia force. The obtained results from this study confirm that the pressure drop is a linear function of flow velocity at low Reynolds number regime and a quadratic function at higher Reynolds numbers. The morphological effect is an additional factor in determining pressure drop.