Al-Qadisiyah Journal for Engineering Sciences

Improve heat transfer in sudden expansion canal by using obstacle

Document Type : Research Paper

Authors

Mohammed E. Salman
Dhafer Abdulameer Hamzah

Department of Mechanical Engineering, Collage of Engineering, University of Al-Qadisiyah, Ad-Diwaniyah, Iraq.

https://doi.org/10.30772/qjes.v15i4.886
Abstract
The purpose of this investigation is to determine if adding an isolated cylinder to the domain can improve forced convection in the laminar case of the sudden expansion flow in a two-dimensional channel. The range of the Reynolds number (1-200) and the number of prattle 0.71, the impact of different cross-stream locations (x=10.4,10.8 and 11.2) of the circular cylinder on the flow, and thermal properties of the sudden expansion flow have been computationally studied (air). COMSOL Multiphysics is utilized to address the governing continuity, Navier-Stokes, energy equation of energy, and the necessary boundary conditions. Although streamline and isotherm profiles have been used to describe the flow and thermal fields, the temperature dependence of the flow viscosity and thermal conductivity has not been taken into account. The findings presented here demonstrate an improvement in the peak Nusselt value when a circular cylinder is used in comparison to the unobstructed condition.

Keywords

Obstacle
Sudden expansion
Streamline
Al-Qadisiyah Journal for Engineering Sciences
Volume 15, Issue 4
Autumn 2022
Pages 250-254

  • Receive Date 07 September 2022
  • Revise Date 15 October 2022
  • Accept Date 30 November 2022

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