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123942

Velocity Distribution Model in Open Channels Based on the Harmonic Mean Distance.

Article

Last updated: 22 Jan 2023

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Subjects

-

Tags

Civil Engineering

Abstract

A new analytical technique for drawing isovel patterns in any open channel cross section is presented based on the Harmonic Mean Distance concept. It is assumed that the instantaneous velocity at a point in the section is affected by the roughness of each point in the boundary and its distance from it. A computer program is established to compute the Harmonic Mean Distance at all points for open channel of different cross sections, taking into consideration the effect of the free surface and the composite roughness. Based on the Harmonic Mean Distance the 2-D velocity distribution is predicted using the power law distribution and the logarithmic distribution. Also the velocity factors (α and β ), the location of the maximum velocity, and the ratio of the maximum to the mean velocity (Umccx / V) are calculated. The proposed model is verified with measured velocity profiles from a previous work of other researchers on rectangular cross sections and showed good agreement. 

DOI

10.21608/bfemu.2020.123942

Authors

First Name

Saad

Last Name

Moharam

MiddleName

-

Affiliation

Irrigation and Hydraulics Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

Email

-

City

Mansoura

Orcid

-

First Name

Osami

Last Name

Rageh

MiddleName

-

Affiliation

Irrigation and Hydraulics Department., El-Mansoura University., Faculty of Engineering., Mansoura., Egypt.

Email

drosamirageh@yahoo.com

City

Mansoura

Orcid

-

First Name

Mohsen

Last Name

Ezzeldin

MiddleName

-

Affiliation

Irrigation and Hydraulics Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

Email

-

City

Mansoura

Orcid

-

First Name

Mahmoud

Last Name

Elgamal

MiddleName

-

Affiliation

Irrigation and Hydraulics Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

Email

-

City

Mansoura

Orcid

-

First Name

Mahmoud

Last Name

Elashry

MiddleName

A.

Affiliation

Irrigation and Hydraulics Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

Email

-

City

Mansoura

Orcid

-

Volume

35

Article Issue

2

Related Issue

18139

Issue Date

2010-06-01

Receive Date

2010-04-11

Publish Date

2020-11-18

Page Start

22

Page End

32

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 35_Issue 2_Pages 22-32.pdf

PDF . 788.7kB

Link

https://bfemu.journals.ekb.eg/article_123942.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=123942

Order

3

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

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

MainTitle

-

Details

Type

Article

Created At

22 Jan 2023