Cover Image

Boundary layer flow over a moving surface in a nanofluid beneath a uniform free stream

Purpose – The purpose of this paper is to theoretically investigate the steady two‐dimensional boundary‐layer flow past a moving semi‐infinite flat plate in a water‐based nanofluid containing three different types of nanoparticles: copper (cuprum) Cu, alumina (aluminium oxide) Al2O3, and titania (ti...

Full description

Saved in:
Bibliographic Details
Main Authors: Mohd Rohni, Azizah, Ahmad, Syakila, Pop, Ioan
Format: Article
Language:English
Published: Emerald Group Publishing Limited 2011
Subjects:
QA75 Electronic computers. Computer science
Online Access:http://repo.uum.edu.my/19422/1/IJNMHFF%2021%207%202011%20828-846.pdf
http://repo.uum.edu.my/19422/
http://doi.org/10.1108/09615531111162819
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.uum.repo.19422
record_format eprints
spelling my.uum.repo.194222016-11-14T06:09:06Z http://repo.uum.edu.my/19422/ Boundary layer flow over a moving surface in a nanofluid beneath a uniform free stream Mohd Rohni, Azizah Ahmad, Syakila Pop, Ioan QA75 Electronic computers. Computer science Purpose – The purpose of this paper is to theoretically investigate the steady two‐dimensional boundary‐layer flow past a moving semi‐infinite flat plate in a water‐based nanofluid containing three different types of nanoparticles: copper (cuprum) Cu, alumina (aluminium oxide) Al2O3, and titania (titanium dioxide) TiO2.The effects of moving parameter λ as well as solid volume fraction parameter φ on the flow and heat transfer characteristics are studied.Taking into account the rising demands of modern technology, including chemical production, power stations and microelectronics, there is a need to develop new types of fluids that will be more effective in terms of heat exchange performance.Design/methodology/approach – A similarity transformation is used to reduce the governing partial differential equations to a set of nonlinear ordinary differential equations which are then solved numerically using Keller‐box method.Findings– There is a region of unique solutions for λ>0, however, multiple (dual) solutions exist for λc<λ≤0 and no solutions for λ<λc<0. A reverse flow is formed when λ<0.Research limitations/implications– The solutions can be obtained up to a certain value of the moving parameter (critical value or turning point). The boundary layer separates from the plate beyond the turning point hence it is not possible to get the solution based on the boundary‐layer approximations after this point. To obtain further solutions, the full Navier‐Stokes equations have to be solved.Originality/value– The present results are original and new for the boundary‐layer flow and heat transfer of a moving flat plate in a nanofluid. Therefore, this study would be important for the scientists and engineers in order to become familiar with the flow behaviour and properties of such nanofluids, and the way to predict the properties of this flow for the process equipments. Emerald Group Publishing Limited 2011 Article PeerReviewed application/pdf en http://repo.uum.edu.my/19422/1/IJNMHFF%2021%207%202011%20828-846.pdf Mohd Rohni, Azizah and Ahmad, Syakila and Pop, Ioan (2011) Boundary layer flow over a moving surface in a nanofluid beneath a uniform free stream. International Journal of Numerical Methods for Heat & Fluid Flow, 21 (7). pp. 828-846. ISSN 0961-5539 http://doi.org/10.1108/09615531111162819 doi:10.1108/09615531111162819
institution Universiti Utara Malaysia
building UUM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Utara Malaysia
content_source UUM Institutionali Repository
url_provider http://repo.uum.edu.my/
language English
topic QA75 Electronic computers. Computer science
spellingShingle QA75 Electronic computers. Computer science
Mohd Rohni, Azizah
Ahmad, Syakila
Pop, Ioan
Boundary layer flow over a moving surface in a nanofluid beneath a uniform free stream
description Purpose – The purpose of this paper is to theoretically investigate the steady two‐dimensional boundary‐layer flow past a moving semi‐infinite flat plate in a water‐based nanofluid containing three different types of nanoparticles: copper (cuprum) Cu, alumina (aluminium oxide) Al2O3, and titania (titanium dioxide) TiO2.The effects of moving parameter λ as well as solid volume fraction parameter φ on the flow and heat transfer characteristics are studied.Taking into account the rising demands of modern technology, including chemical production, power stations and microelectronics, there is a need to develop new types of fluids that will be more effective in terms of heat exchange performance.Design/methodology/approach – A similarity transformation is used to reduce the governing partial differential equations to a set of nonlinear ordinary differential equations which are then solved numerically using Keller‐box method.Findings– There is a region of unique solutions for λ>0, however, multiple (dual) solutions exist for λc<λ≤0 and no solutions for λ<λc<0. A reverse flow is formed when λ<0.Research limitations/implications– The solutions can be obtained up to a certain value of the moving parameter (critical value or turning point). The boundary layer separates from the plate beyond the turning point hence it is not possible to get the solution based on the boundary‐layer approximations after this point. To obtain further solutions, the full Navier‐Stokes equations have to be solved.Originality/value– The present results are original and new for the boundary‐layer flow and heat transfer of a moving flat plate in a nanofluid. Therefore, this study would be important for the scientists and engineers in order to become familiar with the flow behaviour and properties of such nanofluids, and the way to predict the properties of this flow for the process equipments.
format Article
author Mohd Rohni, Azizah
Ahmad, Syakila
Pop, Ioan
author_facet Mohd Rohni, Azizah
Ahmad, Syakila
Pop, Ioan
author_sort Mohd Rohni, Azizah
title Boundary layer flow over a moving surface in a nanofluid beneath a uniform free stream
title_short Boundary layer flow over a moving surface in a nanofluid beneath a uniform free stream
title_full Boundary layer flow over a moving surface in a nanofluid beneath a uniform free stream
title_fullStr Boundary layer flow over a moving surface in a nanofluid beneath a uniform free stream
title_full_unstemmed Boundary layer flow over a moving surface in a nanofluid beneath a uniform free stream
title_sort boundary layer flow over a moving surface in a nanofluid beneath a uniform free stream
publisher Emerald Group Publishing Limited
publishDate 2011
url http://repo.uum.edu.my/19422/1/IJNMHFF%2021%207%202011%20828-846.pdf
http://repo.uum.edu.my/19422/
http://doi.org/10.1108/09615531111162819
_version_ 1644282700521013248
score 13.211869

Similar Items