Laminar Natural Convection Study in a Horizontal HalfElliptical Enclosure Using Heater on Horizontal Wall

Authors

  • Abdelkarim Bouras Laboratory of Energetic Physics, University brothers Mentouri Constantine1, Constantine1, Algeria
  • Djedid Taloub Laboratory of Renewable Energy and Sustainable Development (LRESD), University brothers Mentouri Constantine1, Algeria
  • Abdelhadi Beghidja Laboratory of Renewable Energy and Sustainable Development (LRESD), University brothers Mentouri Constantine1, Algeria
  • Zied Driss Laboratory of Electromechanical Systems (LASEM), National School of Engineers of Sfax (ENIS), University of Sfax, Sfax, Tunisia

Keywords:

thermal transfer, natural convection, circular and half-elliptical, multicellular flow, laminar flow, steady flow

Abstract

A numerical analysis of laminar natural convection in a horizontal annulus between an internal heated plane and an external cold half-elliptical was investigated using approximation of Boussinesq. Both internal and external walls are maintained at the constant temperature and air is the working fluid. Numerical solutions are obtained using a commercial computational fluid dynamics package, FLUENT, using the finite volume method. Effects of the Rayleigh number, Rat, on the Nusselt number, Nu, as well as velocity and temperature fields are investigated for the range of Rat from 1.0 103 to 5.0 105. The results show that for a small thermal Rayleigh number, the heat transfer within the annulus is essentially controlled by the conduction process. As the thermal Rayleigh number increases (Rat ? 104), the role of convection becomes predominant. Also the heat transfer rate increases. The aim of this study is to observe the effects of thermal Rayleigh numberon the structure of the flow and the distribution of the temperature.

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Published

2021-02-14

How to Cite

Bouras, A. ., Taloub, D. ., Beghidja, A. ., & Driss, Z. . (2021). Laminar Natural Convection Study in a Horizontal HalfElliptical Enclosure Using Heater on Horizontal Wall. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 53(2), 223–233. Retrieved from https://www.akademiabaru.com/submit/index.php/arfmts/article/view/3535

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