Heat transfer enhancement of vertical dimpled fin array in natural convection

Chang, Shyy Woei; Wu, Hung‐Wei; Guo, Da Yu; Shi, Jun jie; Chen, Tang Hong

doi:10.1016/j.ijheatmasstransfer.2016.09.094

Cited by 47 publications

(9 citation statements)

References 13 publications

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“…They found out optimum spacing for maximum heat transfer rate and further studied the effect of varying Prandtl number on thermal performance. Chang et al [2] examined numerically the thermal performance of vertical fin array with and without dimples. They concluded that average value of Nusselt number (Nu) is the strong function of Rayleigh number (Ra).…”

Section: Literature Surveymentioning

confidence: 99%

Thermal Analysis of Vertical Plate Fin Heat Sink

et al. 2020

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Heat Sinks are widely used to remove the heat from the components which are generating heat during their functioning. Overheating causes malfunctioning of the components as well as it is responsible for reducing their life. Free convection is very common way of heat transfer from the heat sink considering power requirement, pressure drop and cost of the forced convection. This paper presents the thermal analysis of vertical plate fin heat sink by theoretical and experimental method at variable heat input. The results are obtained by taking experimental observations and are validated with already existing correlations suggested by various researchers in the literature.

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Section: Literature Surveymentioning

confidence: 99%

Thermal Analysis of Vertical Plate Fin Heat Sink

et al. 2020

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“…Sajedi et al 4 concluded that the thermal resistance of the square and circular pin fins with a splitter plate decreased 36.8% and 23.8% under forced conditions, respectively. Chang et al 5 achieved a 61-68% increase in Nu number for all Ra levels in a heat sink with a dimple fin array under natural convection. Many studies mainly focused on fin designs such as slightly inclined plate-fin, 6 honeycomb fins, 7 plate fins with cut corners, 8 plate-fin heat sink with fillet profile, 9 trapezoidal and reversed trapezoidal fins, 10 and trapezoidal-groove combination.…”

Section: Introductionmentioning

confidence: 99%

Effect of channel and fin geometries on a trapeze plate-fin heat sink performance

Özdilli

Şevik

2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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This study aims to achieve a minimum base temperature (or junction temperature) and hence better thermal performance. Trapezoidal curved plate-fin heat sink with dolphin fins and rectangular channel (Model-1) and trapezoidal curved plate-fin heat sink with dolphin fins, cut corner, and rectangular channel (Model-2) were designed and compared with a standard plate-fin heat sink. The effects of fins on the airflow and heat transfer in designed plate-fin heat sinks have been investigated numerically. The numeric results show that the use of fins and small changes in geometry significantly improve the heat transfer rate. Outcomes of the study showed 44–51% and 57–62% convective heat transfer enhancement compared with a standard plate-fin heat sink, without any overall mass augmentation, in Model-1 and Model-2, respectively. The presence of dolphin fins reduces the thermal resistance by up to 30%, which contributes to the overall thermal enhancement of the designed plate-fin heat sinks. Simulation results show that increasing the fins in areas close to the heat source and reducing the non-working areas significantly influence the thermal performance of heat sinks. The results also show that the trapeze plate-fin heat sinks with the different channel-fin geometries are superior to the standard trapeze plate-fin heat sink in thermal performance.

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“…They found that the optimum fin distance where the maximum heat transfer rate for turbulent flow is between s/d = 0.28 to 0.31 or 7 mm to 7.7 mm. To increase the heat transfer rate in the fins, many researchers change the geometric shape and direction of its orientation as was done by Shyy-Woei Chang et al [9]. The authors numerically examined the effect of dimples on vertical fin arrays for natural convection.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis Natural Convection Heat Transfer from Vertical Cylinder Annular Fins with The Addition of Slits

2021

IJETER

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One method of increasing the heat transfer rate of the fins is by adding slits to the fins. The purpose of this study was to analyze the heat transfer rate by adding slits in the annular fins with a vertical cylinder under natural convection conditions. The vertical cylinder length, cylinder diameter, fin diameter, and distance between the fins are 313 mm, 25 mm, 125 mm, and 7 mm, respectively. The number of slits varied from 2 slits and 4 slits and the spacing of the slits was kept constant by 5 mm. This research was conducted with a simulation method using Autodesk CFD 2019 software. As a result, fins with slits and fins without slits were compared. The value of the heat transfer rate that occurs and the heat transfer coefficient in the annular fin with slits is better than the fin without slits. The highest heat transfer rates were 142.928 W and 2.6022 W/m 2K for an annular fin with 2 slits

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Heat transfer enhancement of vertical dimpled fin array in natural convection

Cited by 47 publications

References 13 publications

Thermal Analysis of Vertical Plate Fin Heat Sink

Thermal Analysis of Vertical Plate Fin Heat Sink

Effect of channel and fin geometries on a trapeze plate-fin heat sink performance

Numerical Analysis Natural Convection Heat Transfer from Vertical Cylinder Annular Fins with The Addition of Slits

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