Experimental and numerical study about local heat transfer in a microchannel with a pin fin

Wang, Yingying; Shin, Jeong-Heon; Woodcock, Corey; Yu, Xueli; Peles, Yoav

doi:10.1016/j.ijheatmasstransfer.2018.01.034

Cited by 48 publications

(4 citation statements)

References 34 publications

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“…Circular pin fins have also been shown to be remarkably effective in changing the fluid state, increasing fluid disturbance and improving heat transfer performance. Wang et al [52] investigated the heat transfer performance of microchannels containing only one single pin fin under single-phase flow. The presence of the pin fin splits the fluid medium into two accelerated flows, and then the mixing of the fluids promotes vortex shedding at the trailing edge of the pin fin (Fig.…”

Section: Fin Structurementioning

confidence: 99%

Topological structures for microchannel heat sink applications – a review

Wang

et al. 2023

Manufacturing Rev.

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The microchannel heat sink (MCHS) has the advantages of small heat transfer resistance, high heat transfer efficiency and small size, which exhibits good heat transfer performance in the field of active heat dissipation of electronic devices integrated with high heat flux density. In this paper, the application of MCHS in thermal management is reviewed in recent years, and the research progress of microchannel topology on enhancing heat transfer performance is summarized. Firstly, the research progress on the cross-sectional shape of the microchannel shows that the heat transfer area and fluid flow dead zone of the microchannel is the keys to affecting the heat transfer performance; Secondly, the microchannel distribution and the bionic microchannel structure have a great role in enhancing heat transfer performance, especially in microchannel temperature uniformity; Thirdly, the disturbing effect caused by interrupted structures in microchannels such as ribs and concave cavities has become a hot topic of research because it can weaken the thermal boundary layer and increase heat dissipation. Finally, the commonly used MCHS materials and cooling media are summarized and introduced. Based on the above reviews of MCHS research and applications, the future trends of MCHS topologies are presented.

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Section: Fin Structurementioning

confidence: 99%

Topological structures for microchannel heat sink applications – a review

Wang

et al. 2023

Manufacturing Rev.

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“…Their results show that an increment in the velocity of the NF leads to a significant improvement of the Nu ave and the thermal hydraulic performance. Weng et al [33] carried out an experimental and numerical study on the effect of ribs on heat transfer in the microchannel. According to their findings, the presence of vortex generators will improve the thermal performance of the microchannel.…”

Section: Introductionmentioning

confidence: 99%

“…From the studies reviewed on microchannels [22][23][24][25][26][27][28][29][30][31][32][33], it can be concluded that the use of microchannels, due to the increasing need of different industries for small and efficient heat exchangers, is considered to be more than before. Therefore, the behavior of microchannels in different environments needs to be given more attention.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Nanoparticle Shape and Microchannel Geometry on Fluid Flow and Heat Transfer in a Porous Microchannel

2020

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Microchannels are widely used in electrical and medical industries to improve the heat transfer of the cooling devices. In this paper, the fluid flow and heat transfer of water–Al2O3 nanofluids (NF) were numerically investigated considering the nanoparticle shape and different cross-sections of a porous microchannel. Spherical, cubic, and cylindrical shapes of the nanoparticle as well as circular, square, and triangular cross-sections of the microchannel were considered in the simulation. The finite volume method and the SIMPLE algorithm have been employed to solve the conservation equations numerically, and the k-ε turbulence model has been used to simulate the turbulence fluid flow. The models were simulated at Reynolds number ranging from 3000 to 9000, the nanoparticle volume fraction ranging from 1 to 3, and a porosity coefficient of 0.7. The results indicate that the average Nusselt number (Nuave) increases and the friction coefficient decreases with an increment in the Re for all cases. In addition, the rate of heat transfer in microchannels with triangular and circular cross-sections is reduced with growing Re values and concentration. The spherical nanoparticle leads to maximum heat transfer in the circular and triangular cross-sections. The heat transfer growth for these two cases are about 102.5% and 162.7%, respectively, which were obtained at a Reynolds number and concentration of 9000 and 3%, respectively. However, in the square cross-section, the maximum heat transfer increment was obtained using cylindrical nanoparticles, and it is equal to 80.2%.

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“…The hotspots imposed by spatially non uniform heat flux were seen to have a considerable effect on the melting and solidification cycle and hence on the thermal performance of the heat sink. Wang et al [7] studied local single-phase flow heat transfer downstream a single pin fin experimentally and numerically. Three distinct flow regimes, depending on the Reynolds number, were characterized, namely: laminar flow with steady wake, laminar flow with unsteady wake, and turbulent flow.…”

Section: Introductionmentioning

confidence: 99%

Design of a Heat Sink for an Electronic Component in ABB Drive using Different Types of Fins

2018

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This paper considers an analytical approach in the design of a passive heat sink for an ABB electrical drive. The heat sink is intended to dissipate a certain amount of heat energy and to maintain the surface temperature of an electronic communication board at the prescribed temperature. The maximum size of the heat sink is known due to the existing space constraint. This paper details the step by step procedure in the development of a passive heat sink that functions based on the natural convection. Two commonly used fins such as rectangular plate fins and rectangular pins fins were considered for the project. A parametric study was considered wherein a relationship was developed between the convection heat transfer coefficient and the air flow. Likewise, the impact of convection heat transfer coefficient was seen on the rate of heat transfer and the fin geometry.

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Experimental and numerical study about local heat transfer in a microchannel with a pin fin

Cited by 48 publications

References 34 publications

Topological structures for microchannel heat sink applications – a review

Topological structures for microchannel heat sink applications – a review

The Effect of Nanoparticle Shape and Microchannel Geometry on Fluid Flow and Heat Transfer in a Porous Microchannel

Design of a Heat Sink for an Electronic Component in ABB Drive using Different Types of Fins

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