Numerical Investigation of Natural Convection Heat Transfer in Turbulent Flow Inside a Square Enclosure Using Large Eddy Simulation

Authors

  • Seyed Ahmad Edalatpanah * Department of Industrial Engineering, Yonsei University, Seoul, South Korea; Department of Applied Mathematics, Graphic Era Hill University, Dehradun, India. https://orcid.org/0000-0002-1406-7068
  • Hashem Saberi Najafi Department of Applied Mathematics and Computer Science, Faculty of Mathematical Sciences, University of Guilan, Rasht, Iran. https://orcid.org/0000-0001-6723-8126

https://doi.org/10.48313/mtei.v2i2.42

Abstract

The present study focuses on the numerical analysis of turbulent natural convection within a square enclosure with differentially heated vertical walls, and this is achieved by employing a Large Eddy Simulation (LES) approach coupled with the Lattice Boltzmann Method (LBM). The lattice model used for this study is based on the D2Q9 lattice for both hydrodynamic and thermal fields, and buoyancy effects are modeled using the Boussinesq approximation. The results for this study are presented using contours of stream function, isotherms, and mean Nusselt number. At moderate values of Rayleigh number, i.e., for Ra ≤ 108, the thermal field within the core of the square cavity is found to be almost uniform, and this shows that heat transfer is due to conduction. However, for Ra = 109, significant distortions and oscillations within the isothermal contours show that turbulent convection is established within the square cavity. 

Keywords:

Turbulent natural convection, Large Eddy simulation, Lattice Boltzmann method, Square cavity

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Published

2025-06-17

Issue

Vol. 2 No. 2 (2025): Mechanical Technology and Engineering Insights (MTEI)

Section

Articles

How to Cite

Edalatpanah, S. A. ., & Saberi Najafi, H. (2025). Numerical Investigation of Natural Convection Heat Transfer in Turbulent Flow Inside a Square Enclosure Using Large Eddy Simulation. Mechanical Technology and Engineering Insights, 2(2), 94-104. https://doi.org/10.48313/mtei.v2i2.42

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