Numerical Investigation of Thermohydraulic Performance in Laminar Flow through Microchannels Equipped with Longitudinal Vortex Generators.

Articles in Press

Document Type : Full Length Research Article

Authors

1 Departement of physics, Faculty of Matter Sciences, Applied Energetic Physics Laboratory (LPEA), University of Batna 1, 05000 Batna, Algeria

2 Department of Mechanical Engineering, Faculty of Technology Sciences, Constantine 1, Frères Mentouri University, Constantine 25000, Algeria

Abstract

Vortex generators (VGs) are widely employed to enhance heat transfer in channel flows by inducing vortices, with their performance strongly influenced by geometric parameters and flow conditions. This study numerically investigates the thermohydraulic performance of laminar flow (Re = 200–1200) in a rectangular microchannel (H = 0.26 mm) equipped with longitudinal vortex generators (LVGs) of reduced height (0.75H). The objective is to assess the impact of reduced LVG height on pressure loss and heat transfer enhancement, using water as the working fluid. Numerical simulations were validated against existing data, with deviations remaining below 10%, and were subsequently conducted for three LVG orientation angles (30°, 135°, and 150°). The results indicate that at Re = 1200, the LVGs increased the friction factor by up to 6% for 30° and 150° and 8% for 135°, while increasing the Nusselt number by up to 18% for 30° and 150° and 24% for 135°. The highest thermal performance factor of 1.21 was achieved at the 135° orientation for Re=1200, identifying it as the optimal configuration among those tested.

Keywords

Main Subjects

Journal of Heat and Mass Transfer Research

Articles in Press, Accepted Manuscript
Available Online from 20 June 2025

Files

History

  • Receive Date: 10 December 2024
  • Revise Date: 26 May 2025
  • Accept Date: 20 June 2025

Share

How to cite

Statistics