Entropy Analysis in a Heat Sink with Laminar Fluid Flow Regime: A Numerical Investigation

Najafpour, Ahmad; Khalili, Alireza

doi:10.22034/jmnr.2025.15169.1009

Entropy Analysis in a Heat Sink with Laminar Fluid Flow Regime: A Numerical Investigation

Document Type : Research Article

Authors

Ahmad Najafpour ¹

Alireza Khalili ²

¹ Department of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran

² Department of Energy Engineering, Sharif University of Technology, Tehran, Iran

10.22034/jmnr.2025.15169.1009

Abstract

Thermal management in electrical appliances has a great impact on their performance and can reduce energy consumption. Heat sinks are an effective tool for cooling electrical equipment that can be used. In the present work, the entropy generation at Reynolds numbers (Re) = 200 to 1000 for 5 configurations of heat sinks with a constant heat flux of 20 kW/m2 has been investigated, which can be effective in reducing the temperature of electrical devices. The results obtained show that with increasing Re, the amount of entropy generated due to fluid flow (Sp) is increased and the amount of entropy generated due to heat transfer (St) is decreased, and finally, increasing Re reduces entropy generation and improves system performance. At Re = 200, the St for Case 4 is decreased by 59.86%, 41.83%, 2.45%, and 2.74%, respectively, compared to the base case, Case 1, Case 2, and Case 3. At Re = 1000, the amount of Na in Case 1, Case 2, Case 3, and Case 4 is decreased by 33.36%, 53.47%, 53.97%, and 55.66%, respectively.

Keywords

Minichannel heat sink

Entropy generation

Thermal management

CFD