Experimental Study Convection Heat Transfer Inside the Triangular Duct Filled with Porous Media

heat transfer coefficient significantly by (90.2%) and (92.1%) at porosity (0.616, 0.468), respectively, when compared with an empty duct. The results also revealed that the local Nusselt number decreased when the flow's axial position increased with increasing air velocity. The pressure on both ends of the test section increased as the air velocity rose and reduced as the size of the glass spheres increased. Therefore, the drag coefficient decreases as the modified Reynolds number increases with the diameter of glass spheres. The current research was compared with previous research, and the results were satisfactory. Correlational relationships were reached between the Nusselt number and the Reynolds number.