Analysis of laminar flow and heat transfer in an interrupted microchannel heat sink with different shaped ribs

Research output: Contribution to journalArticle

Abstract

A numerical study was conducted to investigate the mechanism of laminar flow and heat transfer enhancement in an interrupted microchannel heat sink (IMCHS) with different shaped ribs at Reynolds number ranging from 100 to 900. The global flow features, heat transfer and friction for IMCHS with no ribs, rectangle ribs, triangle ribs and trapezoid ribs are detailed compared. The results show that the local heat transfer and friction performance of IMCHS with ribs show significant increase at the windward side of the ribs. Additionally, the smaller the chamfer of ribs, the larger average heat transfer and friction performance. For IMCHS with rectangle ribs, the maximum increment of Nu and f can reach to 1.81 and 2.59, respectively. Concerning the overall heat transfer performance (PEC), the trapezoid ribs show the best behavior with PEC = 1.65–1.38 at Re = 100–900.

Details

Authors
Organisations
External organisations
  • Harbin Institute of Technology
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Energy Engineering

Keywords

  • Different rib shapes, Interrupted microchannel heat sink, Numerical simulation, Overall heat transfer performance
Original languageEnglish
JournalJournal of Thermal Analysis and Calorimetry
Publication statusPublished - 2019 Dec 18
Publication categoryResearch
Peer-reviewedYes