Performance improvements of microchannel heat sink using wavy channel and nanofluids

Sakanova, Assel; Keian, Chan Chun; Zhao, Jiyun

doi:10.1016/j.ijheatmasstransfer.2015.05.033

Cited by 209 publications

(61 citation statements)

References 51 publications

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“…Heat transfer surface area is limited in miniature designs, therefore, they cannot be cooled down with natural or forced convection when working fluid is air. Therefore, the current literature focuses on heat transfer enhancement with phase changing materials or forced convection with water, oil or nano-fluids working fluids [3][4][5][6][7][8][9][10][11][12][13][14]. These methods are essential in order to increase the rate of heat transfer.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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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“…6b presents an overall thermal resistance and thermodynamic performance index versus the pumping power. It was found that the overall thermal resistance of the MN-MCHS decreased with the increase of the pumping power due to the increase in the mass flow rate [7,21,38]. At pumping powers less than 0.5 W, the overall thermal resistance decreased rapidly with the increase in pumping power [39].…”

Section: A Heat Flux and Pumping Power Examinationmentioning

confidence: 99%

“…Azizi et al [5] found that nanofluids not only could increase the average and local Nusselt numbers but could also decrease the bottom surface temperature. Sakanova et al [7] reported a study on wavy MCHS using nanofluids. Their research revealed that the wavy MCHS could improve heat transfer performance compared to that of the straight MCHS.…”

Section: Introductionmentioning

confidence: 99%

Enhancement thermodynamic performance of microchannel heat sink by using a novel multi-nozzle structure

Tran

Chang

Teng

et al. 2016

International Journal of Heat and Mass Transfer

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“…In the field of heat exchanger performance, it is known that utilization of wavy walls (or corrugations) can potentially lead to better heat transfer performance due to enhanced mixing of the fluid by the wavy surfaces [23,24].…”

Section: Open Accessmentioning

confidence: 99%

Electrohydrodynamic Nanofluid Hydrothermal Treatment in an Enclosure with Sinusoidal Upper Wall

2015

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Abstract:The influence of non-uniform electric filed on Fe3O4-Ethylene glycol nanofluid hydrothermal treatment in an enclosure with sinusoidal upper and moving lower walls is investigated in this study. Control Volume based Finite Element Method (CVFEM) is utilized to simulate in the presented model. Numerical investigation are conducted for the sundry parameters such as Reynolds number; nanoparticle volume fraction and supplied. Results show that supplied voltage can change the flow shape. Coulomb force causes isotherms denser near the moving wall. Heat transfer rises with augment of supplied voltage and Reynolds number. Effect of electric filed on heat transfer is more pronounced at low Reynolds number. Finally, a comparison with the existing literature is also made.

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Performance improvements of microchannel heat sink using wavy channel and nanofluids

Cited by 209 publications

References 51 publications

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

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

Enhancement thermodynamic performance of microchannel heat sink by using a novel multi-nozzle structure

Electrohydrodynamic Nanofluid Hydrothermal Treatment in an Enclosure with Sinusoidal Upper Wall

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