Numerical and Experimental Studies on Pressure Drop in Milling Parameter Optimized Aluminium Heat Sink Channel

S. Bhattacharyya*, J. Pandey, H. Chelladurai, A. Husain, M. Z. Ansari

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Micro-/mini-channel heat sink is an effective scheme for cooling electronic components. The main advantages of such a heat sink are robust design, compactness and high surface-to-volume ratio. Present study investigates effect of channel surface roughness on its pressure drop using numerical and experimental techniques. Numerical analysis was conducted using commercial computational fluid dynamics analysis software, ANSYS Fluent, and results for velocity and pressure characteristics were obtained. The channel surface conditions were changed as smooth channel and rough channels with ε = 2.5 μm and ε = 3.85 μm. In experiments, a 20-mm-long square channel of depth 2 mm was fabricated in aluminium substrate using milling parameters optimized to achieve the best surface finish. The water flow conditions across the channel were changed from Re = 200 to Re = 1000. Results show that the pressure drop values ranged from 20 to 170 Pa and the average pressure drop measured in micro-milled channel is close to rough channels with ε = 2.5 μm.

Original languageEnglish
Title of host publicationRecent Advances in Manufacturing, Automation, Design and Energy Technologies - Proceedings from ICoFT 2020
EditorsSendhil Kumar Natarajan, Rajiv Prakash, K. Sankaranarayanasamy
PublisherSpringer Science and Business Media Deutschland GmbH
Number of pages8
ISBN (Print)9789811642210
Publication statusPublished - 2022
Externally publishedYes
Event1st International Conference on Future Technologies in Manufacturing, Automation, Design and Energy, ICoFT 2020 - Karaikal, India
Duration: Dec 28 2020Dec 30 2020

Publication series

NameLecture Notes in Mechanical Engineering
ISSN (Print)2195-4356
ISSN (Electronic)2195-4364


Conference1st International Conference on Future Technologies in Manufacturing, Automation, Design and Energy, ICoFT 2020


  • Channel roughness
  • Computational fluid dynamics
  • Entrance length
  • Heat sink
  • Pressure drop

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this