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140419

Forced Convection Heat Transfer in Circular Meso-Tubes.

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Last updated: 04 Jan 2025

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Tags

Mechanical Power Engineering

Abstract

Convection heat transfer of water flow inside a circular meso-channel was investigated experimentally. To perform this experimental study, an experimental test rig was designed and constructed. Test section was shell and tube heat exchanger. It consists of seven meso scale circular tubes surrounded by a saturated steam to perform its outer surface at constant temperature, Water flows inside these tubes in steady flow and pulsating flow. The ranges tested for pulsation frequencies are 0.5 Hz to 5 Hz and Reynolds number is of 200 to 5000. Four values of inner diameters was tested in this study ; 0.25, 0.35, 0.52 and 0.7 mm. Experimental measurements for mass flow rate, temperature, pressure, pressure drop and pulsation frequency are taken to perform the required analysis. Therefore, the average value of convection heat transfer coefficient and friction factor for different operating parameters are computed The experimental results show that, the friction factor in the studied operating range decreases as Reynolds number increases but its values are deviated from those reported in conventional tubes due to the small dimensions of the meso-tubes. The friction factor decreases with decreasing tube diameter. Also, Nusselt number increases with increasing Reynolds number for pulsating flow and steady flow. For pulsating flow, Nusselt number takes lower values than steady flow for the same conditions in the studied operating ranges. Comparison between the obtained experimental results with the previous data and the classical correlations for conventional tubes was done and the disagreement among the researchers was still. Two empirical correlations for both friction factor and Nusselt number were obtained in the range of the studied operating parameters.
 
 

DOI

10.21608/bfemu.2021.140419

Authors

First Name

Lotfy

Last Name

Rabie

MiddleName

H.

Affiliation

Faculty of Engineering, Seuez Canal University, Port Said, Egypt.

Email

-

City

Port Said

Orcid

-

First Name

Hesham

Last Name

Mostafa

MiddleName

M.

Affiliation

Higher Technological Institute, Tenth of Ramadan City, Egypt.

Email

dr.heshammostafa@yahoo.com

City

-

Orcid

-

First Name

Gamal

Last Name

Sultan

MiddleName

Ebrahim

Affiliation

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

Email

gisultan@mans.edu.eg

City

Mansoura

Orcid

-

First Name

M.

Last Name

El-Booz

MiddleName

A.

Affiliation

Faculty of Engineering, Seuez Canal University, Port Said, Egypt.

Email

-

City

Port Said

Orcid

-

Volume

29

Article Issue

4

Related Issue

19658

Issue Date

2005-12-01

Receive Date

2004-10-11

Publish Date

2021-01-17

Page Start

22

Page End

37

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 29_Issue 4_Pages 22-37.pdf

PDF . 607.5kB

Link

https://bfemu.journals.ekb.eg/article_140419.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=140419

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

Forced Convection Heat Transfer in Circular Meso-Tubes.

Details

Type

Article

Created At

22 Jan 2023