Effect of rotating cylinder on heat transfer in a square enclosure filled with nanofluids

Convective heat transfer in a differentially heated square enclosure with an inner rotating cylinder is studied theoretically. The free space between the cylinder and the enclosure walls is filled with water–Ag, water–Cu, water–Al2O3 or water–TiO2 nanofluids. The governing equations are formulated f...

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Main Authors:	Roslan, Rozaini, H., Saleh, I., Hashim
Format:	Article
Published:	Elsevier 2012
Subjects:	QC Physics
Online Access:	http://dx.doi.org/10.1016/j.ijheatmasstransfer.2012.07.051 http://dx.doi.org/10.1016/j.ijheatmasstransfer.2012.07.051

id	uthm-3101
recordtype	eprints
spelling	uthm-31012013-03-04T04:32:03Z Effect of rotating cylinder on heat transfer in a square enclosure filled with nanofluids Roslan, Rozaini H., Saleh I., Hashim QC Physics Convective heat transfer in a differentially heated square enclosure with an inner rotating cylinder is studied theoretically. The free space between the cylinder and the enclosure walls is filled with water–Ag, water–Cu, water–Al2O3 or water–TiO2 nanofluids. The governing equations are formulated for velocity, pressure and temperature formulation and are modeled in COMSOL, a partial differential equation (PDE) solver based on the Galerkin finite element method (GFEM). The governing parameters considered are the solid volume fraction, 0.0 ⩽ ϕ ⩽ 0.05, the cylinder radius, 0 ⩽ R ⩽ 0.3 and the angular rotational velocity, −1000 ⩽ Ω ⩽ 1000. The results are presented to show the effect of these parameters on the heat transfer and fluid flow characteristics. It is found that the strength of the flow circulation is much stronger for a higher nanoparticle concentration, a better thermal conductivity value and a smaller cylinder with a faster, negative rotation. The maximum heat transfer are obtained at a high nanoparticle concentration with a good conductivity value, a slow positive rotation and a moderate cylinder size located in the center of the enclosure. Elsevier 2012 Article PeerReviewed http://dx.doi.org/10.1016/j.ijheatmasstransfer.2012.07.051 Roslan, Rozaini and H., Saleh and I., Hashim (2012) Effect of rotating cylinder on heat transfer in a square enclosure filled with nanofluids. International Journal of Heat and Mass Transfer, 55 . ISSN 00179310 http://eprints.uthm.edu.my/3101/
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Tun Hussein Onn Malaysia
building	UTHM Institutional Repository
collection	Online Access
topic	QC Physics
spellingShingle	QC Physics Roslan, Rozaini H., Saleh I., Hashim Effect of rotating cylinder on heat transfer in a square enclosure filled with nanofluids
description	Convective heat transfer in a differentially heated square enclosure with an inner rotating cylinder is studied theoretically. The free space between the cylinder and the enclosure walls is filled with water–Ag, water–Cu, water–Al2O3 or water–TiO2 nanofluids. The governing equations are formulated for velocity, pressure and temperature formulation and are modeled in COMSOL, a partial differential equation (PDE) solver based on the Galerkin finite element method (GFEM). The governing parameters considered are the solid volume fraction, 0.0 ⩽ ϕ ⩽ 0.05, the cylinder radius, 0 ⩽ R ⩽ 0.3 and the angular rotational velocity, −1000 ⩽ Ω ⩽ 1000. The results are presented to show the effect of these parameters on the heat transfer and fluid flow characteristics. It is found that the strength of the flow circulation is much stronger for a higher nanoparticle concentration, a better thermal conductivity value and a smaller cylinder with a faster, negative rotation. The maximum heat transfer are obtained at a high nanoparticle concentration with a good conductivity value, a slow positive rotation and a moderate cylinder size located in the center of the enclosure.
format	Article
author	Roslan, Rozaini H., Saleh I., Hashim
author_facet	Roslan, Rozaini H., Saleh I., Hashim
author_sort	Roslan, Rozaini
title	Effect of rotating cylinder on heat transfer in a square enclosure filled with nanofluids
title_short	Effect of rotating cylinder on heat transfer in a square enclosure filled with nanofluids
title_full	Effect of rotating cylinder on heat transfer in a square enclosure filled with nanofluids
title_fullStr	Effect of rotating cylinder on heat transfer in a square enclosure filled with nanofluids
title_full_unstemmed	Effect of rotating cylinder on heat transfer in a square enclosure filled with nanofluids
title_sort	effect of rotating cylinder on heat transfer in a square enclosure filled with nanofluids
publisher	Elsevier
publishDate	2012
url	http://dx.doi.org/10.1016/j.ijheatmasstransfer.2012.07.051 http://dx.doi.org/10.1016/j.ijheatmasstransfer.2012.07.051
first_indexed	2018-09-05T11:03:15Z
last_indexed	2018-09-05T11:03:15Z
_version_	1610765194759241728

Effect of rotating cylinder on heat transfer in a square enclosure filled with nanofluids

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