Free convective/radiative heat transfer from pin-fin arrays with a vertical base plate (general representation of heat transfer performance)

Aihara, Toshio; Maruyama, Shigenao; Kobayakawa, Shinichi

doi:10.1016/0017-9310(90)90253-q

Cited by 64 publications

(2 citation statements)

References 12 publications

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“…Figures 10 and 11 present predicted and measured thermal resistances for both the HFH and the PFH under natural and forced convection conditions, respectively. Figures 10 and 11 also show evaluated thermal resistances of the PFH using the correlation formulated by Aihara et al [12] for the natural convection and the correlation developed by Khan et al [13] for the forced convection. Figure 10 shows that the discrepancy between experimental and numerical results for the HFH is reasonably small; the maximum discrepancy is found to be 8%.…”

Section: Thermal Performancementioning

confidence: 97%

Performance of Hybrid Fin Heat Sinks for Thermal Control of Light Emitting Diode Lighting Modules

Kim

2013

Journal of Electronic Packaging

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In this paper we introduce a hybrid fin heat sink (HFH) proposed for the thermal control of light emitting diode (LED) lighting modules. The HFH consists of the array of hybrid fins which are hollow pin fins having internal channels and integrated with plate fins. The thermal performance of the HFH under either natural or forced convection condition is both experimentally and numerically investigated, and then its performance is compared with that of a pin fin heat sink (PFH). The observed maximum discrepancies of the numerical prediction to the measurement for the HFH are 7% and 6% for natural and forced convection conditions. The reasonable discrepancies demonstrate the tight correlation between the numerical prediction and the measurement. The thermal performance of the HFH is found to be 12-14% better than the PFH for the natural convection condition. The better performance might be explained by the enlarged external surface and the internal flow via the channel of the HF. The reference HFH is about 14% lighter than the reference PFH. The better thermal performance and the lighter weight of the HFH show the feasibility as the promising heat sink especially for the thermal control of LED street and flood lighting modules.

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Section: Thermal Performancementioning

confidence: 97%

Performance of Hybrid Fin Heat Sinks for Thermal Control of Light Emitting Diode Lighting Modules

Kim

2013

Journal of Electronic Packaging

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“…Many studies of heat transfer characteristics using large scaled heat sinks have been carried out so far. For example, Aihara et al [1] and Sara [2] revealed that the heat sink performance depends on the pin size, the population density of pin. Zografos and Sunderland [3] studied the effect of pin arrangement on the heat transfer performance, and reported that a choking phenomenon, which had a negative effect on heat transfer from a heat sink, was observed in the air space among pin fins.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Characteristics of Square Micro Pin Fins under Natural Convection

Matsumoto¹,

Tomimura²,

Koito³

2014

JECTC

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In order to comply with the recent demand for downsizing of the electric equipment, the miniaturization and the improvement in heat transfer performance of a heat sink under natural air-cooling are increasingly required. This paper describes the experimental and numerical investigations of heat sinks with miniature/micro pins and the effect of the pin size, pin height and the number of pins on heat transfer characteristics of heat sinks. Five types of basic heat sink models are investigated in this study. The whole heat transfer area of heat sinks having the different pin size, pin height and the number of pins respectively is kept constant. From a series of experiments and numerical analyses, it has been clarified that the heat sink temperature rises with increase in the number of pins. That is, the heat sink with miniaturized fine pins showed almost no effect on the heat transfer enhancement. This is because of the choking phenomenon occurred in the air space among the pin fins. Reflecting these results, it is confirmed that the heat transfer coefficient reduces with miniaturization of pins. Concerning the effects of the heat transfer area on the heat sink performance, almost the same tendency has been observed in other three series of large surface area, that is, higher pin height. Furthermore as a result of studying non-dimensional convection heat transfer performance, it was found that the relation between the Nusselt number (Nu) and the Rayleight number (Ra) is given by Nu = 0.16 Ra 0.52 .

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Free Convection in Tubes and Channels, on Ribbed Surfaces and in Tube Bundles

Free-Convective Heat Transfer

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Free convective/radiative heat transfer from pin-fin arrays with a vertical base plate (general representation of heat transfer performance)

Cited by 64 publications

References 12 publications

Performance of Hybrid Fin Heat Sinks for Thermal Control of Light Emitting Diode Lighting Modules

Performance of Hybrid Fin Heat Sinks for Thermal Control of Light Emitting Diode Lighting Modules

Heat Transfer Characteristics of Square Micro Pin Fins under Natural Convection

Free Convection in Tubes and Channels, on Ribbed Surfaces and in Tube Bundles

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