Numerical investigations of impingement cooling performance on flat and non-flat targets with dimple/protrusion and triangular rib

Jing, Qi; Zhang, Di; Xie, Yonghui

doi:10.1016/j.ijheatmasstransfer.2018.05.009

Cited by 46 publications

(10 citation statements)

References 33 publications

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“…The results showed that the application of convex structures could minimize the flow resistance. Jing et al [98,99] successively optimized the channel structures applied in jet impingement and swirl cooling, and pointed out that it was better to arrange the protrusion on the side of the nozzle for drag reduction (Figure 9(e3)). characteristic of the microchannel heat sinks with impinging jets (Figure 9(e2)).…”

Section: Concave-convex Structurementioning

confidence: 99%

Nature-Inspired Structures Applied in Heat Transfer Enhancement and Drag Reduction

Zhu

Peng

et al. 2021

Micromachines

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Heat exchangers are general equipment for energy exchange in the industrial field. Enhancing the heat transfer of a heat exchanger with low pump energy consumption is beneficial to the maximum utilization of energy. The optimization design for enhanced heat transfer structure is an effective method to improve the heat transfer coefficient. Present research shows that the biomimetic structures applied in different equipment could enhance heat transfer and reduce flow resistance significantly. Firstly, six biomimetic structures including the fractal-tree-like structure, conical column structure, hybrid wetting structure, scale structure, concave-convex structure and superhydrophobic micro-nano structure were summarized in this paper. The biomimetic structure characteristics and heat transfer enhancement and drag reduction mechanisms were analyzed. Secondly, four processing methods including photolithography, nanoimprinting, femtosecond laser processing and 3D printing were introduced as the reference of biomimetic structure machining. Finally, according to the systemic summary of the research review, the prospect of biomimetic heat transfer structure optimization was proposed.

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Section: Concave-convex Structurementioning

confidence: 99%

Nature-Inspired Structures Applied in Heat Transfer Enhancement and Drag Reduction

Zhu

Peng

et al. 2021

Micromachines

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“…A numerical study was performed by Jing et al [45] to investigate the performance of jet impingement cooling on flat and non-flat target surfaces (concave and V shapes) (see Figure 2). The Reynolds number (based on the jet diameter) range for the study was 10,000-50,000.…”

Section: Target Surface Shape and Spacing Between Jet Plate/nozzle And Target Surfacementioning

confidence: 99%

Heat Transfer Augmentation through Different Jet Impingement Techniques: A State-of-the-Art Review

et al. 2021

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Jet impingement is considered to be an effective technique to enhance the heat transfer rate, and it finds many applications in the scientific and industrial horizons. The objective of this paper is to summarize heat transfer enhancement through different jet impingement methods and provide a platform for identifying the scope for future work. This study reviews various experimental and numerical studies of jet impingement methods for thermal-hydraulic improvement of heat transfer surfaces. The jet impingement methods considered in the present work include shapes of the target surface, the jet/nozzle–target surface distance, extended jet holes, nanofluids, and the use of phase change materials (PCMs). The present work also includes both single-jet and multiple-jet impingement studies for different industrial applications.

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“…According to [17], this method presents advantages in terms of being much less dissipative than Eulerian counterparts on the advection term of the Navier-Stokes equations. Even though the Lagrangian method presents promising results for the modeling of turbulent flows and heat transfer, Eulerian methods have been extensively applied over recent years, and several models have been implemented on the jet impingement field [10,[18][19][20][21][22][23][24]. From the different numerical methods-direct numerical simulation (DNS), large eddy simulation (LES), and Reynolds-averaged Navier-Stokes (RANS)-RANS is the most used method since it provides fairly accurate results at low computational costs.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Multiple Jets Impinging a Step Surface

Barbosa

Teixeira

2021

Energies

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Multiple jet impingement is a widely implemented convective process for enhancing heat transfer over target surfaces. Depending on the engineering application, the impinging plate can have different configurations. However, the increased complexity of the surface induces complicated thermal behaviors that must be analyzed. In that sense, this study consisted of the experimental and numerical analysis of multiple jets impinging on a step surface. A particle image velocimetry technique was applied to measure velocity fields, while a heat flux sensor was mounted on the surface to determine the heat transfer. Numerical simulations, for both flat and non-flat plates, were conducted in ANSYS FLUENT applying the SST k-ω model, and experimental results were used to validate the model. Three surface configurations were analyzed, flat, 1 D, and 2 D steps, and the results show an increase in the average Nusselt number compared with the flat plate, 9% and 20%, respectively. This increase was mainly due to the intensification of the flow turbulence induced by the step. Numerical results were in good agreement with the experiments, but the heat transfer was slightly underpredicted for the 2 D step case due to the difficulty of predicting with accuracy the velocity field near the step.

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Numerical investigations of impingement cooling performance on flat and non-flat targets with dimple/protrusion and triangular rib

Cited by 46 publications

References 33 publications

Nature-Inspired Structures Applied in Heat Transfer Enhancement and Drag Reduction

Nature-Inspired Structures Applied in Heat Transfer Enhancement and Drag Reduction

Heat Transfer Augmentation through Different Jet Impingement Techniques: A State-of-the-Art Review

Experimental and Numerical Study of Multiple Jets Impinging a Step Surface

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