Effect of sine-squared thermal boundary condition on augmentation of heat transfer in a triangular solar collector filled with different nanofluids
Numerical study of heat transfer phenomena has become a major field of research nowadays. In engineering applications, different boundary conditions arise which have various effects on heat transfer characteristics. For the present work, a triangular-shape cavity has been analyzed for the sine-squar...
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TAYLOR & FRANCIS INC, 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
2015
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| Online Access: | http://eprints.um.edu.my/15849/1/Effect_of_Sine-Squared_Thermal_Boundary_Condition_on_Augmentation_of_Heat_Transfer.pdf |
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| author | Rahman, M.M. Saha, S. Mojumder, S. Naim, A.G. Saidur, R. Ibrahim, T.A. |
| author_facet | Rahman, M.M. Saha, S. Mojumder, S. Naim, A.G. Saidur, R. Ibrahim, T.A. |
| author_sort | Rahman, M.M. |
| collection | UM |
| description | Numerical study of heat transfer phenomena has become a major field of research nowadays. In engineering applications, different boundary conditions arise which have various effects on heat transfer characteristics. For the present work, a triangular-shape cavity has been analyzed for the sine-squared thermal boundary condition which is common in practical cases. The augmentation of heat transfer has been done by introducing a nanofluid inside the cavity. Different solid volume fractions (phi=0, 0.05, 0.1, 0.2) of water-CuO, water-Al2O3, and water-TiO2 nanofluid have been tested for the cavity with a wide range of Rayleigh number (Ra=10(5)-10(8)) and for dimensionless time (tau=0.1 to 1). The Galerkin weighted residual finite-element method has been applied for the numerical solution, and numerical accuracy has been checked by code validation. The heat transfer augmentation for different nanofluids has been done in the light of local (Nu(L)) and overall Nusselt number (Nu(av)), and the results have been presented with streamline, isotherm, and related contours, in graphs and charts. It has been found that variable boundary condition has significant effect on flow and thermal fields and increase of solid volume fraction enhances the heat transfer. |
| first_indexed | 2024-03-06T05:39:47Z |
| format | Article |
| id | um.eprints-15849 |
| institution | Universiti Malaya |
| language | English |
| last_indexed | 2024-03-06T05:39:47Z |
| publishDate | 2015 |
| publisher | TAYLOR & FRANCIS INC, 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA |
| record_format | dspace |
| spelling | um.eprints-158492016-04-25T03:21:52Z http://eprints.um.edu.my/15849/ Effect of sine-squared thermal boundary condition on augmentation of heat transfer in a triangular solar collector filled with different nanofluids Rahman, M.M. Saha, S. Mojumder, S. Naim, A.G. Saidur, R. Ibrahim, T.A. T Technology (General) TJ Mechanical engineering and machinery Numerical study of heat transfer phenomena has become a major field of research nowadays. In engineering applications, different boundary conditions arise which have various effects on heat transfer characteristics. For the present work, a triangular-shape cavity has been analyzed for the sine-squared thermal boundary condition which is common in practical cases. The augmentation of heat transfer has been done by introducing a nanofluid inside the cavity. Different solid volume fractions (phi=0, 0.05, 0.1, 0.2) of water-CuO, water-Al2O3, and water-TiO2 nanofluid have been tested for the cavity with a wide range of Rayleigh number (Ra=10(5)-10(8)) and for dimensionless time (tau=0.1 to 1). The Galerkin weighted residual finite-element method has been applied for the numerical solution, and numerical accuracy has been checked by code validation. The heat transfer augmentation for different nanofluids has been done in the light of local (Nu(L)) and overall Nusselt number (Nu(av)), and the results have been presented with streamline, isotherm, and related contours, in graphs and charts. It has been found that variable boundary condition has significant effect on flow and thermal fields and increase of solid volume fraction enhances the heat transfer. TAYLOR & FRANCIS INC, 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA 2015-07-03 Article PeerReviewed application/pdf en http://eprints.um.edu.my/15849/1/Effect_of_Sine-Squared_Thermal_Boundary_Condition_on_Augmentation_of_Heat_Transfer.pdf Rahman, M.M. and Saha, S. and Mojumder, S. and Naim, A.G. and Saidur, R. and Ibrahim, T.A. (2015) Effect of sine-squared thermal boundary condition on augmentation of heat transfer in a triangular solar collector filled with different nanofluids. Numerical Heat Transfer Part B-Fundamentals, 68 (1). pp. 53-74. ISSN 1040-7790, DOI https://doi.org/10.1080/10407790.2014.992058 <https://doi.org/10.1080/10407790.2014.992058>. http://www.tandfonline.com/doi/pdf/10.1080/10407790.2014.992058 10.1080/10407790.2014.992058 |
| spellingShingle | T Technology (General) TJ Mechanical engineering and machinery Rahman, M.M. Saha, S. Mojumder, S. Naim, A.G. Saidur, R. Ibrahim, T.A. Effect of sine-squared thermal boundary condition on augmentation of heat transfer in a triangular solar collector filled with different nanofluids |
| title | Effect of sine-squared thermal boundary condition on augmentation of heat transfer in a triangular solar collector filled with different nanofluids |
| title_full | Effect of sine-squared thermal boundary condition on augmentation of heat transfer in a triangular solar collector filled with different nanofluids |
| title_fullStr | Effect of sine-squared thermal boundary condition on augmentation of heat transfer in a triangular solar collector filled with different nanofluids |
| title_full_unstemmed | Effect of sine-squared thermal boundary condition on augmentation of heat transfer in a triangular solar collector filled with different nanofluids |
| title_short | Effect of sine-squared thermal boundary condition on augmentation of heat transfer in a triangular solar collector filled with different nanofluids |
| title_sort | effect of sine squared thermal boundary condition on augmentation of heat transfer in a triangular solar collector filled with different nanofluids |
| topic | T Technology (General) TJ Mechanical engineering and machinery |
| url | http://eprints.um.edu.my/15849/1/Effect_of_Sine-Squared_Thermal_Boundary_Condition_on_Augmentation_of_Heat_Transfer.pdf |
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