The present work employs pore-scale simulations by constructing true porous shape in order to reduce the uncertainties associated with porous transport models. For a fixed value of porosity, the rib height is varied, while the flow rate is maintained at the lower Reynolds number range (Re = 1 and 10). For various rib heights and flow rates, pressure drop and heat transfer coefficient are determined. It has been showed that as height rises (blockage fraction increases), the resistance to flow created by the porous ribs increases continuously, leading to a greater pressure decrease across the channel. In addition, as the rib height increases, the magnitude of the effective heat transfer coefficient (shown by Nusselt number) increases. Since the Thermal Performance Factor (TPF) can reach to 20.2 and 10.5, respectively, at Re = 1 and 10, the channel with ribs is observed to be improving the overall thermo-hydraulic performance as compared to the empty channel. As a result, inserting the porous rib into the channel may have the intended outcomes of enhancing thermo-hydraulic performance, reducing the maximum temperature of the heated zone and promoting temperature uniformity.