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Convection Heat Transfer and Friction Factor of AL2O3/ Water Nanofluid Flows inside Circular Tube with Inserting Helical Tape.

Article

Last updated: 04 Jan 2025

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Tags

Mechanical Power Engineering

Abstract

Forced convection heat transfer and friction factor for nanofluid flows inside circular  horizontal tube with and without inserting helical tape, was experimentally studied. Electric  heater was wrapped around the outer surface of the tube to obtain a constant and uniform heat  flux at the tube wall. Experiments are conducted with adding nano-particles (AI2O3) to water  up 10, 2% by volume 10 obtain diffrerent concentrations of nanonfluids. An experimental test  loop equipped with the required measuring instruments was designed and constructed to  assess the effects of nano-particles concentration, mass flow rate, and applied heat flux on the  convection heal transfer process and pressure drop. The tested tube fitted with screw helical  tape inserts to evaluate its effects on heal transfer rate and friction factor with nanofluid as the  working fluid compared with pure water. The measurements of temperature, now rate,  applied volt and pressure drop are recorded and manipulated to calculate the convection heat  transfer coefficient and friction factor.  
The obtained experimental results show that, wall temperature was reduced by using  nanofluid compared with pure water. Accordingly. the convection heal transfer coefficient;'  increased when using nanofluid and increased also with increasing heat flux and mass now  rate (Reynolds number). Higher rates of heat transfer and pressure drop are obtained from the  tube fitted with screw helical tape insert compared to flow in a plain/tube under similar  conditions. This improvement in the heat transfer coefficient characterized by a swirling flow as a result of the secondary flow of the fluid flow inside tube with helical tape.
The average value for the thermal-hydraulic performance(ŋ) for tube with inserting helical tape was 1.4 for water only , and 1.8 for nanofluid at concentration 0.8% comparison with the previous work gave good agreement.

DOI

10.21608/bfemu.2020.130480

Keywords

Nanofluid, horizontal tube, Convection heat transfer, Helical Tape Insert

Authors

First Name

Hesham

Last Name

Mostafa

MiddleName

-

Affiliation

Assistant Professor., Mechanical Power Engineering Department., Faculty of Engineering., Higher Technology Institute., Tenth of Ramadan City., Egypt.

Email

dr.heshammostafa@yahoo.com

City

Tenth of Ramadan

Orcid

-

First Name

Mohamed

Last Name

Saafan

MiddleName

-

Affiliation

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

Email

mgmousa@mans.edu.eg

City

Mansoura

Orcid

-

Volume

33

Article Issue

4

Related Issue

18959

Issue Date

2008-12-01

Receive Date

2008-10-11

Publish Date

2020-12-16

Page Start

86

Page End

102

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 33_Issue 4_Pages 86-102.pdf

PDF . 2.4MB

Link

https://bfemu.journals.ekb.eg/article_130480.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=130480

Order

7

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

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

MainTitle

Convection Heat Transfer and Friction Factor of AL2O3/ Water Nanofluid Flows inside Circular Tube with Inserting Helical Tape.

Details

Type

Article

Created At

22 Jan 2023