Comparative study of different vortex generator designs in corrugated channel for turbulent heat transfer enhancement

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics Pub Date : 2025-09-22 DOI:10.1016/j.rinp.2025.108450

Aimen Tanougast , Rachid Bessaih , Krisztián Hriczó

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引用次数: 0

Abstract

In this study, we numerically investigated the enhancement of heat transfer and pressure drop characteristics using vortex generators (VGs) inside a corrugated channel. This study focuses on novel VG shapes: concave-up vortex generators (CUVGs), concave-down vortex generators (CDVGs), and straight vortex generators (SVGs). These shapes were chosen for consistency with the corrugated wall to guide the fluid more smoothly along the wall. The model was solved using ANSYS Fluent, a commercial software based on the finite volume method and known for its conservation properties. For the turbulence model, we used the SST k–ω model because of its accuracy in capturing the flow near the walls. The vortex generators had a significant effect on the thermal and hydraulic performance. They enhance heat transfer by directing the fluid toward the wall, increasing the local velocity, and reducing the thickness of the thermal boundary layer. The CUVGs exhibited a higher heat transfer enhancement, reaching 77% at a Reynolds number of 30,000, followed by the CDVGs and SVGs, albeit with pressure drop penalties. To balance these effects, the PEC showed that SVGs had the best balance, reaching approximately 0.94, which is close to one.

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不同设计的波纹通道涡流发生器增强湍流换热的比较研究

在这项研究中，我们数值研究了在波纹通道内使用涡发生器（VGs）增强传热和压降特性。本研究的重点是新型涡发生器：上凹涡发生器（cuvg）、下凹涡发生器（cdvg）和直涡发生器（svg）。这些形状的选择是为了与波纹壁保持一致，以引导流体更顺利地沿壁流动。该模型采用基于有限体积法的商业软件ANSYS Fluent求解，该软件以其守恒特性而闻名。对于湍流模型，我们使用了SST k -ω模型，因为它在捕获壁面附近的流动方面很准确。涡发生器对热工性能和水力性能有显著影响。它们通过将流体导向壁面、增加局部速度和减小热边界层的厚度来增强传热。cuvg表现出更高的传热增强，在30,000雷诺数下达到77%，其次是cdvg和svg，尽管存在压降损失。为了平衡这些影响，PEC显示svg具有最佳的平衡，达到约0.94，接近于1。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Results in Physics MATERIALS SCIENCE, MULTIDISCIPLINARYPHYSIC-PHYSICS, MULTIDISCIPLINARY

CiteScore

8.70

自引率

9.40%

发文量

754

审稿时长

50 days

期刊介绍： Results in Physics is an open access journal offering authors the opportunity to publish in all fundamental and interdisciplinary areas of physics, materials science, and applied physics. Papers of a theoretical, computational, and experimental nature are all welcome. Results in Physics accepts papers that are scientifically sound, technically correct and provide valuable new knowledge to the physics community. Topics such as three-dimensional flow and magnetohydrodynamics are not within the scope of Results in Physics. Results in Physics welcomes three types of papers: 1. Full research papers 2. Microarticles: very short papers, no longer than two pages. They may consist of a single, but well-described piece of information, such as: - Data and/or a plot plus a description - Description of a new method or instrumentation - Negative results - Concept or design study 3. Letters to the Editor: Letters discussing a recent article published in Results in Physics are welcome. These are objective, constructive, or educational critiques of papers published in Results in Physics. Accepted letters will be sent to the author of the original paper for a response. Each letter and response is published together. Letters should be received within 8 weeks of the article''s publication. They should not exceed 750 words of text and 10 references.