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126775

Natural Convection Heat Transfer from a Heat Sink with Hollow/ Perforated Circular Pin Fins.

Article

Last updated: 04 Jan 2025

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Subjects

-

Tags

Mechanical Power Engineering

Abstract

Experiments were performed on natural convection heat transfer from circular pin fin heat sinks subject to the influence of its geometry, heat flux and orientation. The geometric dependence of heat dissipation from heat sinks of widely spaced solid and hollow/perforated circular pin fins with staggered combination, filled into a healed base of fixed area is discussed. Over the tested range of Rayleigh number, 4.5 x 106≤Ra≤1.65 x 107it was found that the solid pin fin heat sink performance for upward and sideward orientations shows a competitive nature, depending on Rayleigh number and generally shows a higher heat (transfer coefficients than those of the perforated/ hollow pin sin ones in both arrangements. For all tested hollow/perforated pin fin heat sinks, however, the performance for sideward facing orientation was better than that for upward facing orientation. This argument is supported by observing that the augmentation factor was around 1.05-1.11, depending on the hollow pin diameter ratio, DVD, Meanwhile, the heat sink of larger hollow pin diameter ratio, DID offered higher heat transfer coefficient than that of smaller Di/DO for upward orientation, and the situation was reversed for sideword orientation. The heat transfer performance for heat sinks with hollow/perforated pin fins was better than that of solid pins. The temperature difference between the base plate and surrounding air of these heat sinks was less than that of solid pin one and improved with increasing Di/DO.

DOI

10.21608/bfemu.2020.126775

Keywords

energy efficient, Natural convection, Round/ hollow pin firs, Heat sinks, Orientation effects, Electronic cooling

Authors

First Name

E.

Last Name

Elshafei

MiddleName

A. M.

Affiliation

Department of Mechanical Power Engineering, Mansoura University, Mansoura, EGYPT

Email

eeshafel@mans.edu.eg

City

Mansoura

Orcid

-

Volume

34

Article Issue

4

Related Issue

18585

Issue Date

2009-12-01

Receive Date

2009-10-11

Publish Date

2020-12-01

Page Start

83

Page End

95

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 34_Issue 4_Pages 83-95.pdf

PDF . 534.2kB

Link

https://bfemu.journals.ekb.eg/article_126775.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=126775

Order

15

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

https://bfemu.journals.ekb.eg/

MainTitle

Natural Convection Heat Transfer from a Heat Sink with Hollow/ Perforated Circular Pin Fins.

Details

Type

Article

Created At

22 Jan 2023