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Numerical investigation of thermal pulsating alumina/water nanofluid flow over three different cross-sectional channel

S. Hoseinzadeh (Department of Mechanical and Aeronautical Engineering, Centre for Asset Integrity Management, University of Pretoria, Pretoria, South Africa and Young Researchers and Elite Club, West Tehran Branch, Islamic Azad University, Tehran, Iran)
S.M. Taheri Otaghsara (Department of Mechanical Engineering, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran)
M.H. Zakeri Khatir (Department of Mechanical Engineering, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran)
P.S. Heyns (Department of Mechanical and Aeronautical Engineering, Centre for Asset Integrity Management, University of Pretoria, Pretoria, South Africa)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Article publication date: 28 November 2019

Issue publication date: 16 June 2020

123

Abstract

Purpose

The purpose of this study is to investigate the pulsating flow in a three-dimensional channel. Channel flow is laminar and turbulent. After validation, the effect of different channel cross-sectional geometries (circular, hexagonal and triangular) with the pulsating flow are investigated. For this purpose, the alumina nanofluid was considered as a working fluid with different volume percentages (0 per cent [pure water], 3 per cent and 5 per cent).

Design/methodology/approach

In this study, the pulsatile flow was investigated in a three-dimensional channel. Channel flow is laminar and turbulent.

Findings

The results show that the fluid temperature decreases by increasing the volume percentage of particles of Al2O3; this is because of the fact that the input energy through the wall boundary is a constant value and indicates that with increasing the volume percentage, the fluid can save more energy at a constant temperature. And by adding Al2O3 nanofluid, thermal performance improves in channels, but it should be considered that the use of nanofluid causes a pressure drop in the channel.

Originality/value

Alumina/water nanofluid with the pulsating flow was investigated and compared in three different cross-sectional channel geometries (circular, hexagonal and triangular). The effect of different volume percentages (0 per cent [pure water], 3 per cent and 5 per cent) of Al2O3 nanofluid on temperature, velocity and pressure are studied.

Keywords

Citation

Hoseinzadeh, S., Otaghsara, S.M.T., Khatir, M.H.Z. and Heyns, P.S. (2020), "Numerical investigation of thermal pulsating alumina/water nanofluid flow over three different cross-sectional channel", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 30 No. 7, pp. 3721-3735. https://doi.org/10.1108/HFF-09-2019-0671

Publisher

:

Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited

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