Thermal analysis of heat transfer with different fin geometry through straight plate-fin heat sinks

Khudhur, Dhamyaa S.; Al-Zuhairy, Reyadh Ch.; Kassim, Muna S.

doi:10.1016/j.ijthermalsci.2021.107443

Cited by 28 publications

(13 citation statements)

References 9 publications

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“…In recent years, eliminating heat in systems by liquid has been at the center of heat transfer research because of the better thermal properties of liquid than the air (Saini and Webb). Related investigations in this research area mainly fall into coolant and structure optimization, including coolant nature and its flow properties, geometrical modification, single-phase or boiling cooling and morphology of channel surface (Nada et al , 2022; Khudhur et al , 2022; Kadam and Kumar, 2014).…”

Section: Introductionmentioning

confidence: 99%

A numerical study on thermo-hydraulic performance of micro pin-fin heat sink using hybrid pin-fins arrangement for electronic cooling devices

Bari

Targhi

Heyhat

2023

HFF

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Purpose This study aims to examine the effect of a combination of hybrid pin-fin patterns on a heat sink's performance using numerical techniques. Also, flow characteristics have been studied, such as secondary flow formation and flow-wall interaction. Design/methodology/approach In this study, the effect of hybrid arrangements of elliptical and hexagonal pin-fins with different distribution percentages on flow characteristics and performance evaluation criteria in laminar flow was investigated. Ansys-Fluent software solves the governing equations using the finite volume method. Also, the accuracy of obtained results was compared with the experimental results of other similar papers. Findings The results of this study highlighted that hybrid arrangements show higher overall performance than single pin-fin patterns. Among the hybrid arrangements, case 3 has the highest values of performance evaluation criteria, that is, 1.84 in Re = 900. The results revealed that, with the instantaneous change in the pattern from elliptic to hexagonal, the secondary flow increases in the cross-sectional area of the channels, and the maximum velocity in the cross-section of the channel increases. The important advantages of case 3 are its highest overall performance and a lower chip surface temperature of up to about 2% than other hybrid patterns. Originality/value Prior research has shown that in the single pin-fin pattern, the cooling power at the end of the heat sink decreases with increasing fluid temperature. Also, a review of previous studies showed that existing papers had not investigated hybrid pin-fin patterns by considering the effect of changing distribution percentages on overall performance, which is the aim of this paper.

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Section: Introductionmentioning

confidence: 99%

A numerical study on thermo-hydraulic performance of micro pin-fin heat sink using hybrid pin-fins arrangement for electronic cooling devices

Bari

Targhi

Heyhat

2023

HFF

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“…However, the most frequent cooling technique in this field is that using the pairing between an air jet and a mini or micro channel heat sink. The design of a good cooling solution must consider certain factors such as simplicity, price and performance, mainly the thermal resistance provided by the system [9][10][11]. Adil et al [12] have been carried out an experimental and numerical investigation on CPU cooling with air jet impinging minichannel heat sink.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Enhancement through Different Heat Sink/Impinging Air Jet Parameters an Experimental Approach

Beriache¹,

Cherki²,

Saïdia³

et al. 2023

mech

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In the present work, enhancement of the thermal performance of a central processor unit (CPU) cooling system through a heat sink subjected to an impinging air jet is realized. The height of the impinging air jet duct, the mode of air flow on the heat sink, air blowing mode and as well as the suction blow mode "pull" and the air jet duct geometry are three important influence parameters on the phenomenon. The results obtained show that a jet height H = 20mm, a convergent duct of H = 40mm in height and a hair dryer tip provide further improvement of the cooling technique. The two preceding parameters combined with the fan air suction blow mode improve the performance by at least 11,2% compared to the initial configuration (marketed product), having as characteristics (H = 0mm, fan in the blowing push mode). The use of a converging duct and a hair dryer conduit show that the velocities from the hair dryer tip far exceed those from the best standard conduit height, H=20 mm. That said, the improvement of the flow in the central zone is substantially achieved, which consequently improves the heat removal in this zone at least 19%.

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“…Performance enhancement techniques for heat transfer applications include passive, active, and conjugate methods. 4,5 The active method requires external power sources, while the passive method requires no power for the system, such as surface coating, extended surface, ribbed tubes, and various tube inserts. Tubes with inserts have been used as one of the passive heat transfer enhancement techniques and are the most widely used tubes in several heat transfer applications; for example, heat recovery processes, air conditioning and refrigeration systems, and chemical reactors.…”

Section: Introductionmentioning

confidence: 99%

“…Heat transfer enhancement is the process of improving the performance of a heat transfer system. Performance enhancement techniques for heat transfer applications include passive, active, and conjugate methods 4,5 . The active method requires external power sources, while the passive method requires no power for the system, such as surface coating, extended surface, ribbed tubes, and various tube inserts.…”

Section: Introductionmentioning

confidence: 99%

Investigation of heat transfer augmentation in a horizontal tube using different rectangular cut ring inserts

2023

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Experimental and computational investigations have studied the heat transfer, friction factor, and enhancement of heat transfer in a horizontal tube equipped with rectangular cut ring inserts and different diameter ratios (D/d) and pitch-to-tube diameter ratios (p/d t ). In the present study, air having a Reynolds no. range of 6700-20,100 was used as a working fluid. Three diameter ratios (D/d) were considered experimentally and numerically as 1.2, 1.25, and 1.3, and the pitch-totube diameter ratio (p/d t ) was (1, 0.625, and 0.5). Air was forced as working fluid through the tube and a uniform heat flux of 2000, 3500, and 5000 W/m 2 was applied through the tube's exterior surface. On the basis of the turbulence model k-ɛ with various parameters, three-dimensional numerical simulations using the ANSYS Fluent software 17.2 were investigated. Under the same working conditions, the results manifested a higher heat transfer rate and friction factor as compared to the plain tube. The results evinced that the Nusselt number for a horizontal tube equipped with rectangular cut ring inserts having various pitch ratios and diameter ratios is discovered to be higher than that for the plain tube. With the increased ring spacing, the overall improvement in heat transfer occurred. And, with a rise in Re, the total

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Thermal analysis of heat transfer with different fin geometry through straight plate-fin heat sinks

Cited by 28 publications

References 9 publications

A numerical study on thermo-hydraulic performance of micro pin-fin heat sink using hybrid pin-fins arrangement for electronic cooling devices

A numerical study on thermo-hydraulic performance of micro pin-fin heat sink using hybrid pin-fins arrangement for electronic cooling devices

Heat Transfer Enhancement through Different Heat Sink/Impinging Air Jet Parameters an Experimental Approach

Investigation of heat transfer augmentation in a horizontal tube using different rectangular cut ring inserts

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