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173232

Computations of Turbulent Flow Characteristics and Heat Transfer on Forward-Facing Steps.

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Last updated: 22 Jan 2023

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Mechanical Power Engineering

Abstract

 Numerical calculations of heat transfer and flow field characteristics of turbulent recirculating flows on forward-facing steps are presented in this paper. The calculations are based on the (k - ɛ) model. In the vicinity of the wall a linear vorticity distribution model was used. The (k - ɛ) model has improved to account for the streamline curvature and the Reynolds stresses, and the computer program was also improved with a finite difference and iterative technique. 
The present results include computed heat transfer coefficients, streamlines and isothermal lines, velocity profiles and kinetic energy distributions at different Reynolds numbers and different step heights. 
One of the significant results in this study is the influence of the step height on the size and location of the separation region and reattachment point. It was found that the heat transfer mechanism is positively influced by larger step sizes. The size of the isothermal lines becomes smaller and closer to the wall by larger steps. This result is noticed both upstream and downstream of the step. 
 
 
 

DOI

10.21608/bfemu.2021.173232

Authors

First Name

A.

Last Name

El-Hadik

MiddleName

A.

Affiliation

Mechanical Engineering Department., Faculty of Technological Studies., Kuwait

Email

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City

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Orcid

-

First Name

M.

Last Name

Salam

MiddleName

Y.

Affiliation

Mechanical Engineering Department., College of Engineering & Petroleum Kuwait University., Kuwait

Email

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City

-

Orcid

-

Volume

13

Article Issue

2

Related Issue

25101

Issue Date

1988-12-01

Receive Date

1988-10-10

Publish Date

2021-05-29

Page Start

68

Page End

87

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 13_Issue 2_Pages 68-87.pdf

PDF . 1.1MB

Link

https://bfemu.journals.ekb.eg/article_173232.html

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https://bfemu.journals.ekb.eg/service?article_code=173232

Order

14

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