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103094

Theoretical Investigation of Natural Convection Heat Transfer through Rectangular Enclosure.

Article

Last updated: 04 Jan 2025

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Tags

Mechanical Power Engineering

Abstract

Theoretical investigations on natural convection heat transfer have been carried out inside rectangular enclosures filled with air or water. Heat transfer and fluid flow due to buoyancy forces in an enclosure are achieved. The vertical walls are insulated while the top wall is cooled and the bottom wall is heated under uniform heat flux. Steady laminar natural convection in air or water-filled, 2-D rectangular enclosure is studied numerically. The finite difference technique is used to solve the mass, momentum and energy transfer governing equations. The computational results are presented in the form of isotherm and streamline plots. Simulations are performed for several values of both the width-to-height aspect ratio of the enclosure in the range between 0.66 and 8, and the modified Rayleigh number based on the enclosure height in the range between and  whose influences upon the flow patterns, the temperature distributions, and the heat transfer rate are analyzed and discussed. The heat transfer rate from heated enclosure increases as the aspect ratio (A) increases until A=2 and then remains constant with further increase in aspect ratio. The heat transfer rate increases as the modified Rayleigh number increases. Nusselt numbers for both air or water filled enclosures are correlated with both aspect ratio (A) and modified Rayleigh number ( ). In order to validate the numerical code for the present study, present results have been compared with the benchmark results of previous researches.

DOI

10.21608/bfemu.2020.103094

Keywords

Natural convection, heat transfer, Rectangular enclosure, Numerical analysis

Authors

First Name

Amro

Last Name

Abou Elenein

MiddleName

-

Affiliation

Researcher at Mechanical Power Engineering Department., Faculty of Engineering., Mansoura., Egypt.

Email

-

City

-

Orcid

-

First Name

Ahmed

Last Name

Sultan

MiddleName

-

Affiliation

Mechanical Power Engineering Department., Faculty of Engineering., Mansoura.

Email

-

City

-

Orcid

-

First Name

Hesham

Last Name

Mostafa

MiddleName

-

Affiliation

Mech. Power Eng. Dept. , Higher Technological Institute, Tenth of Ramadan City, Egypt

Email

-

City

-

Orcid

-

First Name

Ahmed

Last Name

Hegazi

MiddleName

-

Affiliation

Associate Professor., Mechanical Engineering Department., University of Mansoura., CO 35516., Egypt.

Email

ahmedabd_elsallam@yahoo.com

City

Mansoura

Orcid

-

Volume

39

Article Issue

1

Related Issue

15575

Issue Date

2014-03-01

Receive Date

2014-01-02

Publish Date

2020-07-15

Page Start

23

Page End

38

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 39_Issue 1_Pages 23-38.pdf

PDF . 2.5MB

Link

https://bfemu.journals.ekb.eg/article_103094.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=103094

Order

5

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

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

MainTitle

Theoretical Investigation of Natural Convection Heat Transfer through Rectangular Enclosure.

Details

Type

Article

Created At

22 Jan 2023