Performance analysis of hybrid microchannel heat sink for varying nozzle geometry and layout on the basis of first- and second-law of thermodynamics

Jyoti Pandey, Mohd Zahid Ansari*, Afzal Husain

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


This paper investigates the enhanced cooling performance of a hybrid microchannel heat sink, consists of the microchannel, nozzle and pillars, in terms of various hydrothermal characteristic parameters. Geometric and flow variables such as jet inclination angle (30°–90°), Reynolds number (200–600) and nozzle diameter (in increasing/decreasing order) are considered for the analysis. Parameters related to both the first and second laws of thermodynamics are computed numerically using commercial software ANSYS FLUENT. The decreasing nozzle diameter layout provided the lowest value of the maximum wall temperature as well as a moderate hike in the pressure drop with respect to other cases. Similarly, a smaller nozzle angle is more suitable for better cooling than the larger nozzle angles.

Original languageEnglish
Pages (from-to)5753-5764
Number of pages12
JournalJournal of Mechanical Science and Technology
Issue number12
Publication statusPublished - Dec 2021
Externally publishedYes


  • Entropy generation
  • Hybrid heat sink
  • Jet impingement
  • Microchannel heat sink
  • Thermal resistance

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering

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