Performance Analysis of Nanorefrigerants in Heated and Rotating Concentric And Eccentric Annulus Cylinders

The past decade has seen rapid development of nanofluids science in many aspects. In recent years, refrigerant-based nanofluids have been introduced as nanorefrigerants due to their significant effects over heat transfer performance. In this investigation, the Control Volume based Finite Element Met...

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Main Authors:	R., Mamat, Nor Azwadi, Che Sidik, Alawi, Omer A.
Format:	Article
Language:	English English
Published:	Penerbit Universiti Teknologi Malaysia 2015
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/11339/ http://umpir.ump.edu.my/id/eprint/11339/ http://umpir.ump.edu.my/id/eprint/11339/ http://umpir.ump.edu.my/id/eprint/11339/1/03_2015_JT_Alawi_Azwadi.pdf http://umpir.ump.edu.my/id/eprint/11339/7/Performance%20Analysis%20of%20Nanorefrigerants%20In%20Heated%20and%20Rotating%20Concentric%20and%20Eccentric%20Annulus%20Cylinders.pdf

id	ump-11339
recordtype	eprints
spelling	ump-113392018-01-30T07:17:01Z http://umpir.ump.edu.my/id/eprint/11339/ Performance Analysis of Nanorefrigerants in Heated and Rotating Concentric And Eccentric Annulus Cylinders R., Mamat Nor Azwadi, Che Sidik Alawi, Omer A. TJ Mechanical engineering and machinery The past decade has seen rapid development of nanofluids science in many aspects. In recent years, refrigerant-based nanofluids have been introduced as nanorefrigerants due to their significant effects over heat transfer performance. In this investigation, the Control Volume based Finite Element Method (CVFEM) is used to simulate the natural convection heat transfer of nanorefrigerant in cylindrical horizontal annuli with imposed emperatures in both surfaces. The Maxwell–Garnetts (MG) and Brinkman models are also employed to estimate the effect of thermal conductivity and viscosity of nanorefrigerant. The governing parameters are nanoparticles types, nanoparticles concentration and size, effect of Rayleigh numbers (Ra), eccentricity and rotation of inner cylinder. Results are presented in the form of isotherms and streamlines of nanorefrigerant temperature and velocity. The results indicate that Al2O3/R141b with concentration (2%) and nanoparticles size (20 nm) has the best heat transfer performances. Moreover, the heat transfer and fluid flow enhance by increasing the Rayleigh numbers (Ra). Eccentricity and rotation of inner cylinder also have effects on heat transfer characteristics. Penerbit Universiti Teknologi Malaysia 2015 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/11339/1/03_2015_JT_Alawi_Azwadi.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/11339/7/Performance%20Analysis%20of%20Nanorefrigerants%20In%20Heated%20and%20Rotating%20Concentric%20and%20Eccentric%20Annulus%20Cylinders.pdf R., Mamat and Nor Azwadi, Che Sidik and Alawi, Omer A. (2015) Performance Analysis of Nanorefrigerants in Heated and Rotating Concentric And Eccentric Annulus Cylinders. Jurnal Teknologi (Sciences and Engineering), 77 (8). pp. 91-97. ISSN 0127-9696 (print); 2180-3722 (online) http://www.jurnalteknologi.utm.my/index.php/jurnalteknologi/article/view/6159 DOI: 10.11113/jt.v77.6159
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery R., Mamat Nor Azwadi, Che Sidik Alawi, Omer A. Performance Analysis of Nanorefrigerants in Heated and Rotating Concentric And Eccentric Annulus Cylinders
description	The past decade has seen rapid development of nanofluids science in many aspects. In recent years, refrigerant-based nanofluids have been introduced as nanorefrigerants due to their significant effects over heat transfer performance. In this investigation, the Control Volume based Finite Element Method (CVFEM) is used to simulate the natural convection heat transfer of nanorefrigerant in cylindrical horizontal annuli with imposed emperatures in both surfaces. The Maxwell–Garnetts (MG) and Brinkman models are also employed to estimate the effect of thermal conductivity and viscosity of nanorefrigerant. The governing parameters are nanoparticles types, nanoparticles concentration and size, effect of Rayleigh numbers (Ra), eccentricity and rotation of inner cylinder. Results are presented in the form of isotherms and streamlines of nanorefrigerant temperature and velocity. The results indicate that Al2O3/R141b with concentration (2%) and nanoparticles size (20 nm) has the best heat transfer performances. Moreover, the heat transfer and fluid flow enhance by increasing the Rayleigh numbers (Ra). Eccentricity and rotation of inner cylinder also have effects on heat transfer characteristics.
format	Article
author	R., Mamat Nor Azwadi, Che Sidik Alawi, Omer A.
author_facet	R., Mamat Nor Azwadi, Che Sidik Alawi, Omer A.
author_sort	R., Mamat
title	Performance Analysis of Nanorefrigerants in Heated and Rotating Concentric And Eccentric Annulus Cylinders
title_short	Performance Analysis of Nanorefrigerants in Heated and Rotating Concentric And Eccentric Annulus Cylinders
title_full	Performance Analysis of Nanorefrigerants in Heated and Rotating Concentric And Eccentric Annulus Cylinders
title_fullStr	Performance Analysis of Nanorefrigerants in Heated and Rotating Concentric And Eccentric Annulus Cylinders
title_full_unstemmed	Performance Analysis of Nanorefrigerants in Heated and Rotating Concentric And Eccentric Annulus Cylinders
title_sort	performance analysis of nanorefrigerants in heated and rotating concentric and eccentric annulus cylinders
publisher	Penerbit Universiti Teknologi Malaysia
publishDate	2015
url	http://umpir.ump.edu.my/id/eprint/11339/ http://umpir.ump.edu.my/id/eprint/11339/ http://umpir.ump.edu.my/id/eprint/11339/ http://umpir.ump.edu.my/id/eprint/11339/1/03_2015_JT_Alawi_Azwadi.pdf http://umpir.ump.edu.my/id/eprint/11339/7/Performance%20Analysis%20of%20Nanorefrigerants%20In%20Heated%20and%20Rotating%20Concentric%20and%20Eccentric%20Annulus%20Cylinders.pdf
first_indexed	2023-09-18T22:11:58Z
last_indexed	2023-09-18T22:11:58Z
_version_	1777415087333572608

Performance Analysis of Nanorefrigerants in Heated and Rotating Concentric And Eccentric Annulus Cylinders

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