Journal of Aeronautical Engineering

Journal of Aeronautical Engineering

study free convection heat transfer nanofluid square cavity with a circular hot barrier

Document Type : Original Article

Authors
1 Department of MechanicalEngineering, Velayat University, Iranshahr, Iran
2 Shahid Sattari University of Aeronautical Engineering
10.22034/joae.2024.360138.1127
Abstract
In the present work, free convection heat transfer of nanofluid in a closed square cavity with a hot circular barrier has been investigated. The location of the circular obstacle and the walls are fixed. The governing equations are solved by finite volume method and using simple algorithm. The purpose of this work is to study the effect of Rayleigh number and adding nanoparticles, taking into account the change in the dimensions of the circular barrier in the cavity, as well as taking into account different density approximation models for modeling the heat transfer of the nanofluid in the cavity. The most important results showed that heat transfer along the walls increased with the increase in the dimensions of the circular barrier, the Rayleigh number and the volume fraction of nanoparticles. Also, the most important results showed that with the increase of the Rayleigh number, the average Nusselt number along the walls and the temperature values increase, in addition to the effect of considering different models for approximating the density in modeling of nanofluid free convection heat transfer in cavity by comparing the thermal parameters It showed that Bozinsk's approximation model provides more favorable and accurate results for investigating free convection heat transfer.
Keywords

 
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Volume 26, Issue 1
August 2024
Pages 86-96

  • Receive Date 01 September 2022
  • Revise Date 21 June 2023
  • Accept Date 14 May 2024