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Enhanced Heat Transfer in a Vertical Heated Channel by Incorporation of Inclined Plates. | ||
| Journal of Heat and Mass Transfer Research | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 21 تیر 1404 | ||
| نوع مقاله: Full Length Research Article | ||
| شناسه دیجیتال (DOI): 10.22075/jhmtr.2025.37223.1700 | ||
| نویسندگان | ||
| Nabila Trad1؛ Rabah Henniche* 2؛ Abdelkader Korichi3 | ||
| 1Faculty of Technology, University of Medea, Medea, Algeria | ||
| 2Faculty of technology, University of Medea, Algeria | ||
| 3Faculty of Technology, University of Medea, Algeria | ||
| تاریخ دریافت: 07 فروردین 1404، تاریخ بازنگری: 25 خرداد 1404، تاریخ پذیرش: 21 تیر 1404 | ||
| چکیده | ||
| This study aims to investigate fluid flow and heat transfer behaviors under laminar mixed convective conditions in a vertical heated channel with plates attached to the heated wall in order to enhance the cooling channel. Simulations were conducted using the finite volume method through the OpenFoam © open-source code. The analysis focused on three key physical parameters: Reynolds number varying from 200 to 1400, Grashof number set at 105 and 2×105, and plate tilt angles (γ = 30°, 60°, and 90°), with a fixed plate height of hp = 0.3 and a constant plate spacing of D = 1. The objective was to assess their effects on thermal and flow behaviors in both steady and self-sustained oscillatory flow. The results were presented as dimensionless isotherm contours and streamlines, accompanied by the Nusselt number and friction factor ratios. Findings indicate that both the friction factor and Nusselt number ratios increase as Reynolds number and plate tilt angles increase, while they decrease as the Grashof number increases. The flow translates to a self-sustained oscillatory state at moderate Reynolds numbers (below 1000 for γ = 60° and 90°, below 1200 for γ = 30°). Moreover, as the flow bifurcates to an unsteady state, the Nusselt number significantly increases and can reach up to 18%, 54% and 60% for γ = 30°, 60° and 90°, respectively, compared to the channel without plates. The unsteady flow pattern contributes to enhancing the heat transfer by disturbing the near-wall region. Notably, the plate tilt angle of γ = 30° achieves an optimal balance between enhancing heat transfer efficiency and reducing flow resistance. From these results, it can be concluded that this study be useful for the design efficiency of electronic cooling systems and heat exchangers that can provide maximum heat transfer with minimum flow resistance. | ||
| کلیدواژهها | ||
| Mixed Convection؛ Heat Transfer Enhancement؛ Unsteady flow؛ Plates؛ Channel | ||
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آمار تعداد مشاهده مقاله: 1,128 |
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