Numerical investigation of the fluid flow and heat transfer characteristics of tree-shaped microchannel heat sink with variable cross-section

Huang, Pingnan; Dong, Guanping; Zhong, Xineng; Pan, Mei

doi:10.1016/j.cep.2019.107769

Cited by 60 publications

(21 citation statements)

References 34 publications

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“…The scale, shape and application tend to be diversified. Furthermore, the fractaltree-like structure characteristics mainly include the branch number and angle [18], the channel aspect ratio [19], layer number [20] and shape [21][22][23], which can affect the fractal heat exchanger performance. The bifurcate structure of the vascular or tracheal system in animals; Fractal-like branching channel flow networks: (c1) The fractal-tree-like microchannel network [19], (c2) The overall shape of 5-layer fractal-tree-like microchannel [20], (c3) The tree-shaped microchannel heat sink with cavities [21], (c4) The tree-shaped microchannel heat sink with cavities [21]; (d1) The CAD diagram of Y-type heat exchanger [22], (d2) The CAD diagram of H-type heat exchanger [22], (d3) The plate heat exchanger with lung pattern [23].…”

Section: Fractal-tree-like Structurementioning

confidence: 99%

“…Furthermore, the fractaltree-like structure characteristics mainly include the branch number and angle [18], the channel aspect ratio [19], layer number [20] and shape [21][22][23], which can affect the fractal heat exchanger performance. The bifurcate structure of the vascular or tracheal system in animals; Fractal-like branching channel flow networks: (c1) The fractal-tree-like microchannel network [19], (c2) The overall shape of 5-layer fractal-tree-like microchannel [20], (c3) The tree-shaped microchannel heat sink with cavities [21], (c4) The tree-shaped microchannel heat sink with cavities [21]; (d1) The CAD diagram of Y-type heat exchanger [22], (d2) The CAD diagram of H-type heat exchanger [22], (d3) The plate heat exchanger with lung pattern [23]. Fractal-like branching channel flow networks: (c1) The fractal-tree-like microchannel network [19], (c2) The overall shape of 5-layer fractal-tree-like microchannel [20], (c3) The tree-shaped microchannel heat sink with cavities [21], (c4) The tree-shaped microchannel heat sink with cavities [21]; (d1) The CAD diagram of Y-type heat exchanger [22], (d2) The CAD diagram of H-type heat exchanger [22], (d3) The plate heat exchanger with lung pattern [23].…”

Section: Fractal-tree-like Structurementioning

confidence: 99%

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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: Fractal-tree-like Structurementioning

confidence: 99%

Section: Fractal-tree-like Structurementioning

confidence: 99%

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

Zhu

Peng

et al. 2021

Micromachines

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“…It is found that the flow resistance of the microchannel reaches the minimum upon some optimal configuration of the microchannel. According to the Constructal Theory 28,32,33 along with the bionics concept, 34,35 the present authors proposed a novel structure of microchannel heat sink as shown in Figure 1, which provides the specific definitions of the bifurcation parameters. D i and L i are the hydraulic diameter and the length of the ith straight microchannel.…”

Section: Geometric Design Based On the Constructal Lawmentioning

confidence: 99%

Thermal performance and entropy generation of single‐layer and double‐layer constructal Y‐shaped bionic microchannel heat sinks

et al. 2021

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A kind of Y-shaped bionic microchannel (YBMC) heat sink is proposed and designed based on bionic concept and constructal law. A discontinuous Galerkin finite element method is applied to solve incompressible steady laminar flow and heat transfer in microchannels, and an optimal design strategy for geometrical parameters of the double-layer microchannels with counterflow arrangement is adopted. Results reveal that the proposed YBMC configuration provides much better thermal performance and lower total pressure drop subject to the same mass flow rate when compared to microchannels with rectangular straight configuration. Yet the YBMC design offers a more uniform temperature distribution along the heated surface. By using the principle of entropy generation, the degree of irreversible loss of the Y-shaped bionic cases is much less than those of the rectangular case. The pressure rises at the bifurcations of the first-stage, and the second-stage is related to the restart of boundary layer, confirming that the YBMC exhibits high thermal performance.

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“…A variety of biological characteristics have been used as bionic objects to improve the work efficiency of key component by heat transfer enhancement [18,19], micro-scale structure optimization [20][21][22][23], and reducing surface resistance [24][25][26]. When nutrients and water are transported from the root of the leaf to all parts, the leaf veins play a key role as shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Leaf Vein-Inspired Bionic Design Method for Heat Exchanger Infilled with Graded Lattice Structure

2021

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Due to its excellent performance and high design freedom, the lattice structure has shown excellent capabilities and considerable potential in aerospace and other fields. This paper proposes a method to map the biometric model to the lattice structure. Taking leaf veins as bionic objects, they are used to generate a bionic design with a gradient lattice structure to improve the performance of a heat exchanger. In order to achieve the above goals, this article also proposes a leaf vein model and a mapping method that combine the leaf vein model with the lattice structure. A series of transient thermal finite element simulations was conducted to evaluate and compare the heat dissipation performance of different designs. The analysis results show that the combination of the bionic design and the lattice structure effectively improves the heat dissipation performance of the lattice structure heat exchanger. The results indicate that the application of bionic design in lattice structure design has feasibility and predictable potential.

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Numerical investigation of the fluid flow and heat transfer characteristics of tree-shaped microchannel heat sink with variable cross-section

Cited by 60 publications

References 34 publications

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

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

Thermal performance and entropy generation of single‐layer and double‐layer constructal Y‐shaped bionic microchannel heat sinks

Leaf Vein-Inspired Bionic Design Method for Heat Exchanger Infilled with Graded Lattice Structure

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