Rheological behavior of mechanically stabilized and surfactant-free MWCNT-thermal oil-based nanofluids
The viscosity of nanofluids is one of the important parameter for the design of heat transfer processes. The evolution of usage of nanofluids in heat transfer processes is gaining more industrial consideration due to excellent thermal properties. However, limited attention is focused on the rheologi...
Saved in:
Main Authors: | , , |
---|---|
Format: | Article |
Published: |
Elsevier Ltd
2017
|
Online Access: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85028002562&doi=10.1016%2fj.icheatmasstransfer.2017.07.015&partnerID=40&md5=82b0d454c1f7f6520d1a880dc9f1e65d http://eprints.utp.edu.my/19317/ |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
my.utp.eprints.19317 |
---|---|
record_format |
eprints |
spelling |
my.utp.eprints.193172018-04-24T02:35:58Z Rheological behavior of mechanically stabilized and surfactant-free MWCNT-thermal oil-based nanofluids Ilyas, S.U. Pendyala, R. Narahari, M. The viscosity of nanofluids is one of the important parameter for the design of heat transfer processes. The evolution of usage of nanofluids in heat transfer processes is gaining more industrial consideration due to excellent thermal properties. However, limited attention is focused on the rheological behavior of nanofluids as of today. The multiwall carbon nanotubes (MWCNTs) are stabilized in thermal oil using ultrasonication and high stability is observed. The rheological behavior of thermal-oil based dispersant-free nanofluids are studied at varying high shear rates (100–2000 s− 1), temperatures (25–90 °C) and nanoparticle concentrations (0.1–1 wt). The effect on the shear stress and viscosity by the addition of carbon nanotubes in thermal oil is discussed. The measured effective viscosity is compared with different theoretical conventional models. A significant increment in relative viscosity is observed at high concentrations of carbon nanotubes. A correlation is developed based on the temperature, nanomaterial concentration, and shear rate. © 2017 Elsevier Ltd Elsevier Ltd 2017 Article PeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85028002562&doi=10.1016%2fj.icheatmasstransfer.2017.07.015&partnerID=40&md5=82b0d454c1f7f6520d1a880dc9f1e65d Ilyas, S.U. and Pendyala, R. and Narahari, M. (2017) Rheological behavior of mechanically stabilized and surfactant-free MWCNT-thermal oil-based nanofluids. International Communications in Heat and Mass Transfer, 87 . pp. 250-255. http://eprints.utp.edu.my/19317/ |
institution |
Universiti Teknologi Petronas |
building |
UTP Resource Centre |
collection |
Institutional Repository |
continent |
Asia |
country |
Malaysia |
content_provider |
Universiti Teknologi Petronas |
content_source |
UTP Institutional Repository |
url_provider |
http://eprints.utp.edu.my/ |
description |
The viscosity of nanofluids is one of the important parameter for the design of heat transfer processes. The evolution of usage of nanofluids in heat transfer processes is gaining more industrial consideration due to excellent thermal properties. However, limited attention is focused on the rheological behavior of nanofluids as of today. The multiwall carbon nanotubes (MWCNTs) are stabilized in thermal oil using ultrasonication and high stability is observed. The rheological behavior of thermal-oil based dispersant-free nanofluids are studied at varying high shear rates (100–2000 s− 1), temperatures (25–90 °C) and nanoparticle concentrations (0.1–1 wt). The effect on the shear stress and viscosity by the addition of carbon nanotubes in thermal oil is discussed. The measured effective viscosity is compared with different theoretical conventional models. A significant increment in relative viscosity is observed at high concentrations of carbon nanotubes. A correlation is developed based on the temperature, nanomaterial concentration, and shear rate. © 2017 Elsevier Ltd |
format |
Article |
author |
Ilyas, S.U. Pendyala, R. Narahari, M. |
spellingShingle |
Ilyas, S.U. Pendyala, R. Narahari, M. Rheological behavior of mechanically stabilized and surfactant-free MWCNT-thermal oil-based nanofluids |
author_facet |
Ilyas, S.U. Pendyala, R. Narahari, M. |
author_sort |
Ilyas, S.U. |
title |
Rheological behavior of mechanically stabilized and surfactant-free MWCNT-thermal oil-based nanofluids |
title_short |
Rheological behavior of mechanically stabilized and surfactant-free MWCNT-thermal oil-based nanofluids |
title_full |
Rheological behavior of mechanically stabilized and surfactant-free MWCNT-thermal oil-based nanofluids |
title_fullStr |
Rheological behavior of mechanically stabilized and surfactant-free MWCNT-thermal oil-based nanofluids |
title_full_unstemmed |
Rheological behavior of mechanically stabilized and surfactant-free MWCNT-thermal oil-based nanofluids |
title_sort |
rheological behavior of mechanically stabilized and surfactant-free mwcnt-thermal oil-based nanofluids |
publisher |
Elsevier Ltd |
publishDate |
2017 |
url |
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85028002562&doi=10.1016%2fj.icheatmasstransfer.2017.07.015&partnerID=40&md5=82b0d454c1f7f6520d1a880dc9f1e65d http://eprints.utp.edu.my/19317/ |
_version_ |
1738656052997521408 |
score |
13.18916 |