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147662

Effect of Porosity on the Natural Convection Heat Transfer in an Inclined Annular Porous Medium.

Article

Last updated: 22 Jan 2023

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Tags

Mechanical Power Engineering

Abstract

Experimental study was carried out for the steady laminar natural convection of air in an inclined annulus porous medium, with constant heat flux heated inner cylinder and an isothermally cooled outer  cylinder. The primary objective of the study is to show the effect of porosity of the annulus on the local and maximum temperatures of the heated inner cylinder and the local and mean Nusselt number. The geometrical parameters of the annulus are: diameters of 21/45mm, gap width=12mm, length of 492mm, and an aspect ratio (length/gap width) = 41. The operating parameters are: heat flux 4 ≤Q≤324W, Rayleigh number 10≤Ra≤550 and inclination angle θ=0,30,60 and 90o. The spherical bead diameter are varied from d = 3.11 to 3.97 to 6.35 mm with porosity of 0.42. 0.43 and 0.45 respectively. The results show great influence of the porosity on the local and maximum surface temperatures as well as the local and mean Nusselt number.
The average Nusselt number is correlated with the inclination angle and the Rayleigh and Darcy numbers.

DOI

10.21608/bfemu.2021.147662

Authors

First Name

M.

Last Name

El Kady

MiddleName

S.

Affiliation

Mechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

Email

-

City

Mansoura

Orcid

-

First Name

F.

Last Name

Araid

MiddleName

F.

Affiliation

Mechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

Email

-

City

Mansoura

Orcid

-

First Name

Emad

Last Name

El-Negiry El-Negiry

MiddleName

Abd El-Latief

Affiliation

Mechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

Email

-

City

Mansoura

Orcid

-

First Name

G.

Last Name

Abd El Aziz

MiddleName

B.

Affiliation

Mechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

Email

-

City

Mansoura

Orcid

-

Volume

24

Article Issue

2

Related Issue

21258

Issue Date

1999-06-01

Receive Date

1999-02-11

Publish Date

2021-02-10

Page Start

1

Page End

11

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 24_Issue 2_Pages 1-11.pdf

PDF . 250.7kB

Link

https://bfemu.journals.ekb.eg/article_147662.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=147662

Order

7

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

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

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Article

Created At

22 Jan 2023