Investigation of the hydrothermal enhancement of grooved pin fins heat sinks
Brahim Bencherif, Djamel Sahel, Houari Ameur, Redouane Benzeguir
Abstract
In this paper, a numerical investigation was conducted to analyse heat transfer and fluid flow on a new design of heat exchangers with grooved pin-fin heat sinks (G-PFHS), which included the optimisation of shape, size, and groove number (Ng). The simulation results indicate that all-novel geometries have the highest heat dissipation rates compared to conventional geometry (Cylindrical pin fins heat sink, CPFHS). However, the configuration with semi-circular grooves exhibits the most design compared to other configurations (pin-fins heat sinks with a rectangle, triangular, trapezoidal grooves and CPFHS). Also, after optimisation of the size and number of grooves, the Nusselt number and thermal resistance are improved by 21.01% and 16.70%, respectively, with an increase in the pressure drop by 15.42% compared with the CPFHS at the highest Reynolds number. Therefore, this case provides the best hydrothermal performance factor (HTPF) of 1.18 at Re = 8740.