Simulation of a Cooling System for a Heat Sink Fin Using Acoustic Waves

This study has numerically developed and examined a novel acoustic wave-based cooling method for heat sink fins. The main goal of the study is to find out how heat transfer and cooling efficiency can be improved by acoustic-induced vibrations at the structure's first natural frequency. The Heat Transfer in Solids and Fluids, Laminar Flow, and Solid Mechanics interfaces were fully coupled in COMSOL Multiphysics to perform a numerical simulation in three dimensions. After determining the copper fin's natural frequencies through modal analysis, the coupled acoustic-thermal-structural analysis was conducted using the first mode, which was ۲۷ Hz. In contrast to the steady-state condition without acoustic waves, the results demonstrate that acoustic excitation at this frequency results in observable fin surface vibration, which disturbs the surrounding air and increases convective heat transfer. According to the results, controlled resonant acoustic excitation can be a low-power, efficient method of enhancing passive cooling in small electronic devices.

Keywords:

Acoustic waves , heat transfer enhancement , heat sink fins , structural vibration , resonance frequency , COMSOL Multiphysics , coupled simulation