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Abstract

In the present research work, fluid flow and heat transfer characteristics in the laminar flow in a channel in the presence of five triangular prisms is numerically investigated The computations are performed for Reynolds number of 50 and 250 and blockage ratio (b) of 0.20, where blockage ratio is the ratio of prism base to channel height. Comparison is performed mainly for Reynolds no. 50 and 250. The Navier Stokes equations and the energy equation are solved by using SIMPLE Technique. For the computational domain, the unstructured quadrilateral mesh is used .The results show that in the presence of five triangular prisms, the average Nusselt number at Reynolds number 250 is 129.86% more than Average Nusselt number at Reynolds number 50 for same blockage ratio. The increase is due to the vortices formation which travels a long way in the downstream direction. Heat transfer enhancement for five triangular prisms at Reynolds number 250 is more with respect to plane channel as compared to the five triangular prism at Reynolds number 50 with respect to plane channel for same blockage ratio.