A numerical and experimental study to evaluate performance of vascularized cooling plates

Cho, Kee-Hyeon; Chang, Won-Pyo; Kim, Moo-Hwan

doi:10.1016/j.ijheatfluidflow.2011.09.006

Cited by 16 publications

(23 citation statements)

References 17 publications

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“…Conservation of mass, momentum and energy equations were solved by using a finite element software [38]. First, the plate with parallel cooling channels (semi-circular) was simulated, which is the case discussed in Cho et al [29], detailed information about the design is given in Table 2. Mesh elements are non-uniform with boundary layer meshes in order to uncover the effect of sudden changes of the gradients near the boundaries.…”

Section: Model and Numerical Methodsmentioning

confidence: 99%

“…The residual was imposed as 10 À6 in the numerical procedure. First, the simulation results were validated by using the numerical and experimental data of Cho et al [29]. Fig.…”

Section: Model and Numerical Methodsmentioning

confidence: 99%

“…They have documented the hydrodynamic and thermal characteristics of three different constructs where the complexity of the parallel channel network was altered. Later, Cho et al [29] documented the performance of the three parallel channel vascular channel network mentioned in Cho et al [28] numerically and experimentally. Cho et al [29] documents the hydrodynamic characteristics of vascular channels in details.…”

Section: Introductionmentioning

confidence: 99%

“…Later, Cho et al [29] documented the performance of the three parallel channel vascular channel network mentioned in Cho et al [28] numerically and experimentally. Cho et al [29] documents the hydrodynamic characteristics of vascular channels in details. They have measured the surface temperature of the vascular plate from several locations via thermocouples, and these locations were chosen in the cooled region (active area).…”

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical investigation of constructal vascular channels for self-cooling: Parallel channels, tree-shaped and hybrid designs

Yenigun

Çetkin

2016

International Journal of Heat and Mass Transfer

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a b s t r a c tIn this paper, we show experimentally and numerically how a plate which is subjected to a constant heat load can be kept under an allowable temperature limit. Vascular channels in which coolant fluid flows have been embedded in the plate. Three types of vascular channel designs were compared: parallel channels, tree-shaped and their hybrid. The effects of channel design on the thermal performance for different volume fractions (the fluid volume over the solid volume) are documented. In addition, the effects of the number of channels on cooling performance have been documented. Changing the design from parallel channels to tree-shaped designs decreases the order of pressure drop. Hence increase in the order of the convective heat transfer coefficient is achieved. However, tree-shaped designs do not bathe the entire domain, which increases the conductive resistances. Therefore, additional channels were inserted at the uncooled regions in the tree-shaped design (hybrid design). The best features of both parallel channels and tree-shaped designs are combined in the hybrid of them: the flow resistances to the fluid and heat flow become almost as low as the tree-shaped and parallel channels designs, respectively. The effect of design on the maximum temperature shows that there should be an optimum design for a distinct set of boundary conditions, and this design should be varied as the boundary conditions change. This result is in accord with the constructal law, i.e. the shape should be varied in order to minimize resistances to the flows.

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Section: Model and Numerical Methodsmentioning

confidence: 99%

“…The residual was imposed as 10 À6 in the numerical procedure. First, the simulation results were validated by using the numerical and experimental data of Cho et al [29]. Fig.…”

Section: Model and Numerical Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental and numerical investigation of constructal vascular channels for self-cooling: Parallel channels, tree-shaped and hybrid designs

Yenigun

Çetkin

2016

International Journal of Heat and Mass Transfer

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“…[22][23][24][25][26][27][28][29][30][31] Thermal characteristics and the heat transfer performance of vascular designs are documented in Refs. 32-39.…”

Section: 2mentioning

confidence: 99%

Vascular design for reducing hot spots and stresses

Rocha

Lorente

Bejan

2014

Journal of Applied Physics

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This paper is a proposal to embed tree-shaped vasculatures in a wall designed such that the wall withstands without excessive hot spots and peak stresses the intense heating and pressure that impinge on it. The vasculature is a quilt of square-shaped panels, each panel having a tree vasculature that connects the center with the perimeter. The vascular designs for volumetric cooling can be complemented by the shaping and distributing of channels for maximum strength and thermal performance at the same time. Numerical simulations of heat flow and thermal stresses in three directions show that it is possible to determine the optimal geometric features of configurations with radial channels and trees with radial and one level of bifurcations. The global performance is evaluated in terms of the overall thermal resistance and peak von Mises stresses. The dendritic design is superior under the studied thermal condition.

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