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Effects of Aspect Ratio on Heat Transfer and Pressure Drop in Stationary and Rotating Two-Pass Rectangular Channels with Smooth Wall.

Article

Last updated: 04 Jan 2025

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-

Tags

Mechanical Power Engineering

Abstract

A computational study is performed on three-dimensional turbulent flow and heat transfer in a rotating and non-rotating two-pass smooth rectangular channel with aspect ratio (AR) of 2:1 and 1:2. The focus of this study is to investigate the effect of rotation, mean velocity of coolant fluid and the aspect ratio on the flow and heat transfer characteristics. A Reynolds-averaged Navier Stokes (RANS) turbulence model was employed to solve the NS-equations. Computations were performed with Reynolds number (Re) ranging from 19,000 to 25,000, rotation number (Ro) from 0 to 0.1, inlet coolant-to-wall density ratio (   p/p) was 0.39. The finite volume code, FLUENT ANSYS 6.3 was used to predict the flow and heat transfer. Computational domain was meshed with fine grids to resolve the near wall viscous layer using GAMBIT grid generator. Theoretical results obtained for stationary channels are in good agreement with experimental results of other investigators. Also, it is indicated that the aspect ratio, rotation number and fluid velocity has a great effect on the characteristics of flow, heat transfer and pressure drop in case of rotating two-pass rectangular channels. Moreover it is seen that there is a reversible fluid flow at higher rotation number. 

DOI

10.21608/bfemu.2020.120250

Authors

First Name

Sabry

Last Name

Ragab

MiddleName

-

Affiliation

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

Email

engsabry24@gmail.com

City

Mansoura

Orcid

-

First Name

Ahmed

Last Name

Sultan

MiddleName

Abd El-Razik Ahmed

Affiliation

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

Email

aasultan@mans.edu.eg

City

Mansoura

Orcid

-

First Name

L.

Last Name

Rabee

MiddleName

H.

Affiliation

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

Email

-

City

Mansoura

Orcid

-

First Name

Mohammed

Last Name

El-Naggar

MiddleName

Ahmed Ali

Affiliation

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

Email

-

City

Mansoura

Orcid

-

Volume

37

Article Issue

2

Related Issue

17850

Issue Date

2012-06-01

Receive Date

2012-04-11

Publish Date

2020-10-24

Page Start

67

Page End

83

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 37_Issue 2_Pages 67-83.pdf

PDF . 18.0MB

Link

https://bfemu.journals.ekb.eg/article_120250.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=120250

Order

9

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

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

MainTitle

Effects of Aspect Ratio on Heat Transfer and Pressure Drop in Stationary and Rotating Two-Pass Rectangular Channels with Smooth Wall.

Details

Type

Article

Created At

22 Jan 2023