Journal of Microfluidic and Nanofluidic Research

Journal of Microfluidic and Nanofluidic Research

Effect of Fin Arrangement on Heat Sink Performance: Entropy Analysis

Document Type : Research Article

Authors
1 Department of Energy Engineering, Sharif University of Technology, Tehran, Iran
2 School of Life Science Engineering, College of Interdisciplinary Science & Technology, University of Tehran, Tehran, Iran
Abstract
With the growing demand for compact high-performance electronic devices, effective thermal management has become increasingly critical. This study numerically investigates entropy generation and hydrothermal performance in copper-based mini-channel heat sinks (MCHSs) featuring various fin configurations under laminar flow conditions. Five geometrical designs were simulated using COMSOL Multiphysics at Reynolds numbers between 300 and 600 under a constant heat flux of 20 kW/m². Key parameters such as pressure drop, bottom surface temperature, and entropy generation due to heat transfer and fluid friction were analyzed. The results show that finned configurations significantly improve heat dissipation and reduce entropy generation. Among them, Case 4 achieved the best performance, reducing the augmented entropy generation value by up to 56.27% at Re = 300 compared to the base case.
Keywords