Numerical Validation of Experimental Heat Transfer Coefficient with SiO2 Nanofluid Flowing in a Tube with Twisted Tape Inserts

A numerical model has been developed for turbulent flow of nanofluids in a tube with twisted tape inserts. The model is based on the assumption that van Driest eddy diffusivity equation can be applied by considering the coefficient and the Prandtl index in momentum and heat respectively as a variab...

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Main Authors:	Azmi, W. H., Sharma, K. V., Sarma , P. K., R., Mamat, Shahrani, Anuar, Sundar, L. Syam
Format:	Article
Published:	Elsevier 2014
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/7691/ http://umpir.ump.edu.my/id/eprint/7691/ http://umpir.ump.edu.my/id/eprint/7691/

id	ump-7691
recordtype	eprints
spelling	ump-76912018-01-23T07:09:49Z http://umpir.ump.edu.my/id/eprint/7691/ Numerical Validation of Experimental Heat Transfer Coefficient with SiO2 Nanofluid Flowing in a Tube with Twisted Tape Inserts Azmi, W. H. Sharma, K. V. Sarma , P. K. R., Mamat Shahrani, Anuar Sundar, L. Syam TJ Mechanical engineering and machinery A numerical model has been developed for turbulent flow of nanofluids in a tube with twisted tape inserts. The model is based on the assumption that van Driest eddy diffusivity equation can be applied by considering the coefficient and the Prandtl index in momentum and heat respectively as a variable. The results from the numerical analysis are compared with experiments undertaken with SiO2/water nanofluid for a wide range of Reynolds number, Re. Generalized equation for the estimation of nanofluid friction factor and Nusselt number is proposed with the experimental data for twisted tapes. The coefficient and the Prandtl index in the eddy diffusivity equation of momentum and heat is obtained from the numerical values as a function of Reynolds number, concentration and twist ratio. An enhancement of 94.1 % in heat transfer coefficient and 160 % higher friction factor at Re = 19,046 is observed at a twist ratio of five with 3.0 % volumetric concentration when compared to flow of water in a tube. A good agreement with the limited experimental data of other investigators is observed with Al2O3 and Fe3O4 nanofluids indicating the validity of the numerical model for use with twisted tape inserts. Elsevier 2014-08-01 Article PeerReviewed Azmi, W. H. and Sharma, K. V. and Sarma , P. K. and R., Mamat and Shahrani, Anuar and Sundar, L. Syam (2014) Numerical Validation of Experimental Heat Transfer Coefficient with SiO2 Nanofluid Flowing in a Tube with Twisted Tape Inserts. Applied Thermal Engineering, 73. pp. 294-304. ISSN 1359-4311 http://dx.doi.org/10.1016/j.applthermaleng.2014.07.060 DOI: 10.1016/j.applthermaleng.2014.07.060
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Azmi, W. H. Sharma, K. V. Sarma , P. K. R., Mamat Shahrani, Anuar Sundar, L. Syam Numerical Validation of Experimental Heat Transfer Coefficient with SiO2 Nanofluid Flowing in a Tube with Twisted Tape Inserts
description	A numerical model has been developed for turbulent flow of nanofluids in a tube with twisted tape inserts. The model is based on the assumption that van Driest eddy diffusivity equation can be applied by considering the coefficient and the Prandtl index in momentum and heat respectively as a variable. The results from the numerical analysis are compared with experiments undertaken with SiO2/water nanofluid for a wide range of Reynolds number, Re. Generalized equation for the estimation of nanofluid friction factor and Nusselt number is proposed with the experimental data for twisted tapes. The coefficient and the Prandtl index in the eddy diffusivity equation of momentum and heat is obtained from the numerical values as a function of Reynolds number, concentration and twist ratio. An enhancement of 94.1 % in heat transfer coefficient and 160 % higher friction factor at Re = 19,046 is observed at a twist ratio of five with 3.0 % volumetric concentration when compared to flow of water in a tube. A good agreement with the limited experimental data of other investigators is observed with Al2O3 and Fe3O4 nanofluids indicating the validity of the numerical model for use with twisted tape inserts.
format	Article
author	Azmi, W. H. Sharma, K. V. Sarma , P. K. R., Mamat Shahrani, Anuar Sundar, L. Syam
author_facet	Azmi, W. H. Sharma, K. V. Sarma , P. K. R., Mamat Shahrani, Anuar Sundar, L. Syam
author_sort	Azmi, W. H.
title	Numerical Validation of Experimental Heat Transfer Coefficient with SiO2 Nanofluid Flowing in a Tube with Twisted Tape Inserts
title_short	Numerical Validation of Experimental Heat Transfer Coefficient with SiO2 Nanofluid Flowing in a Tube with Twisted Tape Inserts
title_full	Numerical Validation of Experimental Heat Transfer Coefficient with SiO2 Nanofluid Flowing in a Tube with Twisted Tape Inserts
title_fullStr	Numerical Validation of Experimental Heat Transfer Coefficient with SiO2 Nanofluid Flowing in a Tube with Twisted Tape Inserts
title_full_unstemmed	Numerical Validation of Experimental Heat Transfer Coefficient with SiO2 Nanofluid Flowing in a Tube with Twisted Tape Inserts
title_sort	numerical validation of experimental heat transfer coefficient with sio2 nanofluid flowing in a tube with twisted tape inserts
publisher	Elsevier
publishDate	2014
url	http://umpir.ump.edu.my/id/eprint/7691/ http://umpir.ump.edu.my/id/eprint/7691/ http://umpir.ump.edu.my/id/eprint/7691/
first_indexed	2023-09-18T22:04:33Z
last_indexed	2023-09-18T22:04:33Z
_version_	1777414621368418304

Numerical Validation of Experimental Heat Transfer Coefficient with SiO2 Nanofluid Flowing in a Tube with Twisted Tape Inserts

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