Effect of Grooves Geometric Parameters on Hydraulic Thermal Performance of Circular Pipe Partially Filled with Metallic Foam

Abstract

The present paper addresses the numerical study of non-Darcy laminar forced convection flows in a pipe partially filled with grooved metallic foam attached in the inner pipe wall, which is subjected to a constant heat flux. Computations are carried out for nine different dimensions of grooves with different Reynolds numbers namely; (250 ≤ Re ≤ 2000) and their influences on the fluid flow and heat transfer are discussed. The governing and energy equations are solved using the finite volume method (FVM) with temperature-dependent water properties. The novelty of this work is developing of a new design for the metallic foam, which has not studied previously yet. It is observed that the two helical grooves with two pitches increase the Nu around 5.23% and decrease the pumping power nearly 12%. It is also showed a reduction in the amount of material required for manufacturing the heat exchanger, which leads to a decline in the weight of the system 8.29%. K e y w o rd s: Hydraulic thermal design, enhancement metal foam, partially filled, pumping power,