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...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English English |
| Published: |
Penerbit Universiti Teknologi Malaysia
2015
|
| Subjects: | |
| Online Access: | 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 |
| _version_ | 1796990965010923520 |
|---|---|
| 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 |
| collection | UMP |
| 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. |
| first_indexed | 2024-03-06T11:59:20Z |
| format | Article |
| id | UMPir11339 |
| institution | Universiti Malaysia Pahang |
| language | English English |
| last_indexed | 2024-03-06T11:59:20Z |
| publishDate | 2015 |
| publisher | Penerbit Universiti Teknologi Malaysia |
| record_format | dspace |
| spelling | UMPir113392018-01-30T07:17:01Z 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). (Published) http://www.jurnalteknologi.utm.my/index.php/jurnalteknologi/article/view/6159 DOI: 10.11113/jt.v77.6159 |
| 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 |
| title | 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_short | 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 |
| topic | TJ Mechanical engineering and machinery |
| url | 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 |
| work_keys_str_mv | AT rmamat performanceanalysisofnanorefrigerantsinheatedandrotatingconcentricandeccentricannuluscylinders AT norazwadichesidik performanceanalysisofnanorefrigerantsinheatedandrotatingconcentricandeccentricannuluscylinders AT alawiomera performanceanalysisofnanorefrigerantsinheatedandrotatingconcentricandeccentricannuluscylinders |