Autors: Van Hung T., Hoai Van P., Vassilev, M. P., Minh Phu N.
Title: Numerical analysis of mixed convection from two hot cylinders in a square cavity
Keywords:

Abstract: The numerical analysis investigates mixed convection from two vertically aligned horizontal heated cylinders, placed within a quadrate cavity, one above the other. The objective of this research is to grasp the complex interaction between forced and natural convection mechanisms and their impact on the flow field, temperature distribution, and transfer characteristics. A 2D computational domain with a structured grid is employed to simulate the flow, utilizing appropriate boundary conditions to represent the physical scenario. The results are analysed through visualizations of flow patterns, velocity magnitudes, and local Nusselt number distributions. The findings reveal that mixed convection leads to enhanced heat transfer compared to forced convection alone, particularly on the rear surfaces of the cylinders due to the influence of buoyancy-driven flow. Specifically, the local Nusselt number on the rear of the lower cylinder increases by approximately 25% in mixed convection compared to forced convection. Additionally, mixed convection results in peak velocities that are roughly 1.5 times greater than those observed in forced convection. The study highlights the importance of considering mixed convection effects in thermal design and optimization, especially in applications involving heated elements within enclosures, such as electronic cooling systems and heat exchangers, as neglecting natural convection can lead to significant underestimation of heat transfer and inaccurate predictions of flow behaviours.

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Issue

IOP Conference Series: Earth and Environmental Science, vol. 1532, 2025, Bulgaria, https://doi.org/10.1088/1755-1315/1532/1/012015

Вид: публикация в международен форум, публикация в издание с импакт фактор, публикация в реферирано издание, индексирана в Scopus