Nanofluid heat transfer and entropy generation inside a triangular duct equipped with delta winglet vortex generators

Bijan Darbari, Saman Rashidi, Amir Keshmiri

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents the results of a numerical study on the thermal–hydraulic and entropy generation analysis for a nanofluid flow inside a plate-fin triangular duct. Vortex generators are placed in the duct to improve the heat transfer rate and fluid mixing. Reynolds number (Re), volume fraction of nanoparticles (α) and vortex generators’ angle of attack (θ) are selected as the pertinent parameters. All simulations are performed for the following range of parameters: 200 < Re < 1000; 0<α < 0.05 and 0 < θ< 50. The results are presented for the dimensionless pressure drop, Nusselt number and entropy generations (friction and thermal entropy generations). Results indicate that for θ < 40°, the thermal entropy generation reduces by increasing θ, while for θ > 40°, increasing θ leads to an increase in the thermal entropy generation. Moreover, the friction entropy generation was found to increase by 8% when the angle of attack is increased from 0 to 40°.

Original languageEnglish
Pages (from-to)1045-1055
Number of pages11
JournalJournal of Thermal Analysis and Calorimetry
Volume140
Issue number3
DOIs
Publication statusPublished - 1 May 2020

Keywords

  • Entropy generation
  • Finite volume method
  • Nanofluid
  • Thermal–hydraulic
  • Vortex generator

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