Theoretical Analysis of Heat Transfer and Friction Factor for Turbulent Flow of Nanofluids through Pipes
A numerical model for determining the turbulent characteristics of fluid flow and heat transfer is presented, treating certain constants in the van Driest eddy diffusivity equation of momentum and heat as variables. The viscosity and thermal conductivity of nanofluids are estimated using regression...
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| Format: | Article |
| Language: | English English |
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John Wiley & Sons
2016
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| Online Access: | http://umpir.ump.edu.my/id/eprint/12610/1/Sharma%20et%20al.%202016%20CJCE.pdf http://umpir.ump.edu.my/id/eprint/12610/7/Theoretical%20Analysis%20of%20Heat%20Transfer%20and%20Friction%20Factor%20for%20Turbulent%20Flow%20of%20Nanofluids%20through%20Pipes.pdf |
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| author | K. V., Sharma Azmi, W. H. Kamal, Subhash Sarma, P. K. Vijayalakshmi, Bathula |
| author_facet | K. V., Sharma Azmi, W. H. Kamal, Subhash Sarma, P. K. Vijayalakshmi, Bathula |
| author_sort | K. V., Sharma |
| collection | UMP |
| description | A numerical model for determining the turbulent characteristics of fluid flow and heat transfer is presented, treating certain constants in the van Driest eddy diffusivity equation of momentum and heat as variables. The viscosity and thermal conductivity of nanofluids are estimated using regression equations. It was observed that the turbulent characteristics of nanofluids are different from those of water. The numerical results indicate a higher velocity of SiO2 nanofluid and lower eddy diffusivity compared to Cu under similar operating conditions. The nanofluid temperature gradient increases with concentration and decreases with temperature. However, the temperature gradient is significantly influenced by the particle density. Equations for estimating the coefficient and the Prandtl index in the eddy diffusivity equations of momentum and heat, respectively, are developed as a function of Reynolds number, concentration, and nanofluid properties. The Prandtl index value decreases with increasing concentration, reflecting the reduction in heat transfer coefficients observed at lower operating temperatures. |
| first_indexed | 2024-03-06T12:02:31Z |
| format | Article |
| id | UMPir12610 |
| institution | Universiti Malaysia Pahang |
| language | English English |
| last_indexed | 2024-03-06T12:02:31Z |
| publishDate | 2016 |
| publisher | John Wiley & Sons |
| record_format | dspace |
| spelling | UMPir126102017-09-12T06:42:24Z http://umpir.ump.edu.my/id/eprint/12610/ Theoretical Analysis of Heat Transfer and Friction Factor for Turbulent Flow of Nanofluids through Pipes K. V., Sharma Azmi, W. H. Kamal, Subhash Sarma, P. K. Vijayalakshmi, Bathula TJ Mechanical engineering and machinery A numerical model for determining the turbulent characteristics of fluid flow and heat transfer is presented, treating certain constants in the van Driest eddy diffusivity equation of momentum and heat as variables. The viscosity and thermal conductivity of nanofluids are estimated using regression equations. It was observed that the turbulent characteristics of nanofluids are different from those of water. The numerical results indicate a higher velocity of SiO2 nanofluid and lower eddy diffusivity compared to Cu under similar operating conditions. The nanofluid temperature gradient increases with concentration and decreases with temperature. However, the temperature gradient is significantly influenced by the particle density. Equations for estimating the coefficient and the Prandtl index in the eddy diffusivity equations of momentum and heat, respectively, are developed as a function of Reynolds number, concentration, and nanofluid properties. The Prandtl index value decreases with increasing concentration, reflecting the reduction in heat transfer coefficients observed at lower operating temperatures. John Wiley & Sons 2016 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/12610/1/Sharma%20et%20al.%202016%20CJCE.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/12610/7/Theoretical%20Analysis%20of%20Heat%20Transfer%20and%20Friction%20Factor%20for%20Turbulent%20Flow%20of%20Nanofluids%20through%20Pipes.pdf K. V., Sharma and Azmi, W. H. and Kamal, Subhash and Sarma, P. K. and Vijayalakshmi, Bathula (2016) Theoretical Analysis of Heat Transfer and Friction Factor for Turbulent Flow of Nanofluids through Pipes. The Canadian Journal of Chemical Engineering, 94 (3). pp. 565-575. ISSN 1939-019X. (Published) http://dx.doi.org/10.1002/cjce.22417 DOI 10.1002/cjce.22417 |
| spellingShingle | TJ Mechanical engineering and machinery K. V., Sharma Azmi, W. H. Kamal, Subhash Sarma, P. K. Vijayalakshmi, Bathula Theoretical Analysis of Heat Transfer and Friction Factor for Turbulent Flow of Nanofluids through Pipes |
| title | Theoretical Analysis of Heat Transfer and Friction Factor
for Turbulent Flow of Nanofluids through Pipes |
| title_full | Theoretical Analysis of Heat Transfer and Friction Factor
for Turbulent Flow of Nanofluids through Pipes |
| title_fullStr | Theoretical Analysis of Heat Transfer and Friction Factor
for Turbulent Flow of Nanofluids through Pipes |
| title_full_unstemmed | Theoretical Analysis of Heat Transfer and Friction Factor
for Turbulent Flow of Nanofluids through Pipes |
| title_short | Theoretical Analysis of Heat Transfer and Friction Factor
for Turbulent Flow of Nanofluids through Pipes |
| title_sort | theoretical analysis of heat transfer and friction factor for turbulent flow of nanofluids through pipes |
| topic | TJ Mechanical engineering and machinery |
| url | http://umpir.ump.edu.my/id/eprint/12610/1/Sharma%20et%20al.%202016%20CJCE.pdf http://umpir.ump.edu.my/id/eprint/12610/7/Theoretical%20Analysis%20of%20Heat%20Transfer%20and%20Friction%20Factor%20for%20Turbulent%20Flow%20of%20Nanofluids%20through%20Pipes.pdf |
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