Experimental investigations of conical perforations on the thermal performance of cylindrical pin fin heat sink

Kore, Sandeep S.; Yadav, Rupesh J.; Chinchanikar, Satish; Tipole, Pralhad; Dhole, Vishal

doi:10.1080/01430750.2020.1834451

Cited by 15 publications

(2 citation statements)

References 20 publications

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“…The heat transfer enhancements ranged from 2.28 to 3.01, and the model with the largest performance index-1.34-had a diameter of 0.8 and a pitch ratio of 1. The pinned heat sink that influences fluid turbulence to improve heat transmission was studied by Kore et al, [65]. High power components are used in the heat sinks that use air as their working fluid and are propelled by a tiny fan with a nominal speed mounted to the top of the heat sink to induce drawn or impinged axial air flow [66].…”

Section: Hot Water Cold Watermentioning

confidence: 99%

Heat Transfer Enhancement in Tubular Heat Exchanger with Jet Impingement: A Review

Waware

Kore²,

Patil³

2023

ARFMTS

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Heat exchanger (HE) is a thermal device used to transfer heat from higher fluid temperatures to lower fluid temperatures. There is an increasing need to increase the efficiency of HEs, develop a wide range of investigations to increase heat transfer rate (HTR), and reduce the size and cost of industrial apparatus in accordance. The current work's goal is to review articles that discuss the main types of tubular heat HEs, factors that affect HTR, and jet impingement in tubular HEs, which are considered among the equipment used in various industries. Researchers have proposed several models of tubular HEs. Many industrial processes, cooling technology, refrigeration equipment, sustainable energy applications, and other fields use tubular HEs. Jet impingement cooling is assumed to be a very efficient method for increasing HT rate, and it has many uses in both the scientific and industrial spheres. This paper's goal is to present an overview of various techniques for improving HT in relation to jet impingement cooling and to define the area of potential future research. This study focuses on a variety of experimental and numerical studies to examine the HT and hydrodynamic behaviour of jet impingement over a range of Reynolds numbers, target surface shapes, distances from the jet plate or nozzle to the target plate, extended jet holes, and the use of nanofluids. Both single jet and multiple jet impingements cooling are included in the current work. The summary of jet impingement for various applications keeps the spotlight on new methods for enhancing HT.

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Section: Hot Water Cold Watermentioning

confidence: 99%

Heat Transfer Enhancement in Tubular Heat Exchanger with Jet Impingement: A Review

Waware

Kore²,

Patil³

2023

ARFMTS

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“…In addition, the pressure drop was also reduced by 18% for the same comparison. Kore et al [20] confirmed that the perforation space through the pins fins can increases the heat transfer rates, where for 5 holes, Nusselt number was increased by 23% compared with the conventional pin fins. In general, perforation technique directly influence on the heat transfer and pressure drop characteristics in heat sinks [21,22].…”

Section: Introductionmentioning

confidence: 96%

Numerical Simulation of Heat Transfer Behaviors in Conical Pin Fins Heat Sinks

Souida¹,

Sahel²,

*³

et al. 2022

AMS

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The present study is a numerical investigation of the effect of the shape of pin fins on the overall performances of heat sinks. Conical shaped pin fins with varying conical size ratio (Hcp/d) are considered. Five geometrical cases are explored, namely Hcp/d = 0.167, 0.333, 0.500, 0.667 and 0.833. The distribution and values of temperature, Nusselt number, thermal resistance, pressure drop, as well as the hydrothermal performance factor are determined for various Reynolds numbers (up to 8,000). In addition, the performances of conical shaped fins are compared to those of the cylindrical fins. The obtained results revealed a decrease in the thermal resistance with increasing Re and Hcp/d ratio. At Re = 8000 and when changing (Hcp/d) from 0.167 to 0.833, the thermal resistance is decreased from 192.30% to 83.52% compared to the cylindrical pin fins. However, the increased (Hcp/d) ratio yields an increase in the pressure drop. At Re = 8000, the values of pressure drop for the conical fins are lower than those of the cylindrical fins by 343.32%, 275.92%, 205.79%, 144.86% and 100.38% for Hcp/d = 0.167, 0.333, 0.500, 0.667 and 0.833, respectively. The values of the hydrothermal performance factor (h) for the conical fins are greater than those of the cylindrical fins. Also, an increase in (h) values is observed with decreasing Hcp/d ratio. The highest (h) value of 1.51 is reached with the case Hcp/d = 0.167 at Re = 8,000.

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