Processes, Vol. 13, Pages 1137: A Numerical Study of Aerodynamic Drag Reduction and Heat Transfer Enhancement Using an Inclined Partition for Electronic Component Cooling

Processes doi: 10.3390/pr13041137

Authors:
Youssef Admi
Abdelilah Makaoui
Mohammed Amine Moussaoui
Ahmed Mezrhab

This study presents a numerical investigation of fluid flow around a heated rectangular cylinder controlled by an inclined partition, aiming to suppress vortex shedding, reduce aerodynamic drag, and enhance thermal exchange. The double multiple relaxation time lattice Boltzmann method (DMRT-LBM) is employed to investigate the influence of Reynolds number variations and partition positions on the aerodynamic and thermal characteristics of the system. The results reveal the presence of three distinct thermal regimes depending on the Reynolds number. Increasing the Reynolds number intensifies thermal vortex shedding, thereby improving heat exchange efficiency. Moreover, a higher Reynolds number leads to a greater reduction in the drag coefficient, reaching 125.41% for Re=250. Additionally, improvements in thermal performance were quantified, with Nusselt number enhancements of 29.47% for Re=100, 55.55% for Re=150, 74.78% for Re=200, and 82.87% for Re=250. The influence of partition positioning g on the aerodynamic performance was also examined at Re=150, revealing that increasing the spacing g generally leads to a rise in the drag coefficient, thereby reducing the percentage of drag reduction. However, the optimal configuration was identified at g=2d, where the maximum drag coefficient reduction reached 130.97%. In contrast, the impact of g on the thermal performance was examined for Re=100, 150, and 200, revealing a significant heat transfer improvements on the top and bottom faces: reaching up to 99.47% on the top face for Re=200 at g=3d. Nevertheless, for all Reynolds numbers and partition placements, a decrease in heat transfer was observed on the front face due to the partition shielding it from the incoming flow. These findings underscore the effectiveness of an inclined partition in enhancing both the thermal and aerodynamic performance of a rectangular component. This approach holds strong potential for various industrial applications, particularly in aeronautics, where similar control surfaces are used to minimize drag, as well as in heat exchangers and electronic cooling systems where optimizing heat dissipation is crucial for performance and energy efficiency.

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