An investigation of convective heat transfer in microchannel with Piranha Pin Fin

Yu, Xueli; Woodcock, Corey; Plawsky, Joel L.; Peles, Yoav

doi:10.1016/j.ijheatmasstransfer.2016.07.069

Cited by 68 publications

(9 citation statements)

References 21 publications

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“…Circular pin fins along with the square pin fins showed a significant increase in heat transfer coefficients for a given jet velocity. Yu et al 99 investigated convective heat transfer in a microchannel with a piranha pin fin. The piranha pin fins were constructed to boost heat transfer by controlling the flow field, selectively venting the fluid, and enhancing the surface area.…”

Section: Experimental With Computational Combined Workmentioning

confidence: 99%

Improvement of heat transfer through fins: A brief review of recent developments

Maji¹,

Choubey

2020

Heat Trans

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Fins or extended surfaces are generally used in heat exchangers to enhance heat transfer between the main surface and ambient fluid. Various types of simple-shaped fins, namely, rectangular, square, annular, cylindrical, and tapered, have been used with different geometrical combinations. To satisfy industrial demand, different trials have also been carried out for designing optimized fins. The optimization of fins can be performed either by enhancing heat dissipation at an exact fin weight or by diminishing the weight of the fin by precise heat dissipation. Recently a notable amount of work on some typical fins, like, porous fins and perforated fins, has also been carried out. This paper presents a brief review on heat transfer enhancement using fins of different types considering variable thermophysical and geometric parameters, which will also be useful for future use of geometrical modifications of extended surfaces, based on the cost and availability of space.analytical approach, computational approach, experimental approach, perforated fin, porous fin | INTRODUCTIONAdvanced technologies need high-performance heat transfer equipment. Techniques for enhancing the heat transfer rate are classified into two categories: active and passive methods. In the design point of view, active methods are complex as they require some extraneous power input for necessary flow adjustments and to improve the heat transfer rate and thus applications are limited. On the other hand, passive methods require geometrical or surface adjustments to the flow passage by incorporating additional devices. Additionally, by interrupting or varying the existing flow behavior (except for extended surfaces); higher heat transfer coefficients are promoted through this method, which is also followed by an increase in the corresponding pressure drop. The amount of conduction, convection, and radiation of an object shows the amount of heat it transfers. The heat transfer rate is enhanced by increasing the temperature difference between the object and the environment or by enhancing the coefficient of convective heat transfer or by maximizing the surface area of the body. In some cases, it is not appropriate or cost effective to alter the first two options. Introducing a fin to a body, however, expands the surface area and sometimes this is a cost-effective solution for heat transfer problems. Extended surfaces or fins are illustrations of passive methods that are generally used in different industrial applications for the enhancement of heat transfer between the primary surface (heat sink) and the surrounding fluid. Currently reducing the cost and size of fins is the key target of the fin industry. This demand is generally met by the high-thermal-conductivity and costly metals used to fabricate finned surfaces. Many efforts have been made to construct optimized fins. (a) By changing the size and shape of the solid fin: Instead of a longitudinal rectangular solid fin, if the geometry of fin design is changed, the performance parameters and heat tr...

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Section: Experimental With Computational Combined Workmentioning

confidence: 99%

Improvement of heat transfer through fins: A brief review of recent developments

Maji¹,

Choubey

2020

Heat Trans

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“…The choice of computer-generated structures is enormous and will depend on the desirable goals of capturing or passing suspended particles in or through a membrane and evenness of flow across the lateral exit axis. As an example of guided design, we have selected teardrops because they exhibit relatively low pressure drop and sufficient surface area for binding [27] and because as we show below, (i) they have more uniform velocity distribution, (ii) the overall average velocity was nearly twice that of the commercial membrane, and (iii) particle tortuosity and hence movement was controlled through teardrop orientation and wall charge. Table S1 summarizes the geometrical parameters of the commercial and teardrop membranes.…”

Section: Binary Particle Trackingmentioning

confidence: 99%

“Linking microstructure of membranes and performance”

Sorci

Woodcock

Andersen

et al. 2020

Journal of Membrane Science

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“…They showed that hexagonal and circular pin fin has flow guided structure that proved to be vital in improving the cooling performance. Yu et al, [14] stated the friction factor of PPF is comparable with straight channel and much lower than other micro pin fin heat sinks. In their study, they concluded fluid extraction effect of PPF leads to the enhancement of heat transfer while reducing pressure drop.…”

Section: Introductionmentioning

confidence: 98%

“…Yang et al, [13] and Yu et al, [14] had focused their studies in a pin-finned microchannel heat sink. The former studied five different pin fin configurations while latter focused in microchannel with piranha pin fin (PPF).…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Heat Transfer in A Microchannel Heat Sink with Hourglass Channel Profile

Wong¹,

Chan²,

Goh³

2020

ARFMTS

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The present paper reports the numerical investigation of thermal and hydraulic performance of microchannel heat sink with hourglass profile (MCHS-HG). A 3-D conjugate heat transfer model was used to solve the problem with water as coolant and silicon as material of the heat sink. Performances of MCHS-HG were evaluated with 5 different contraction ratios, (0.2, 0.4, 0.6, 0.8 and 1.0) and 3 different aspect ratios from 4, 5 and 6 with Reynolds number in the range of 300-1800. Thermal performance of MCHS-HG was compared with microchannel heat sink with straight rectangular channel (MCHS-R). Results showed that thermal performance of MCHS-HG is better than MCHS-R for any given aspect ratio. The study on the effect of contraction ratio show that the optimum thermal performance is given by the contraction ratio of 0.4. Microchannel with narrower throat of hourglass profile gives higher pumping power. The assessment on thermal-hydraulic performance of MCHS-HG shows that the MCHS-HG is less economical to be applied as compare to MCHS-R.

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An investigation of convective heat transfer in microchannel with Piranha Pin Fin

Cited by 68 publications

References 21 publications

Improvement of heat transfer through fins: A brief review of recent developments

Improvement of heat transfer through fins: A brief review of recent developments

“Linking microstructure of membranes and performance”

Numerical Study of Heat Transfer in A Microchannel Heat Sink with Hourglass Channel Profile

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