Entropy generation analysis of nanofluid flow in a circular tube subjected to constant wall temperature
Due to their improved thermal conductivity, nanofluids have the potential to be used as heat transfer fluids in thermal systems. However adding particles into nanofluids will increase the viscosity of the fluid flow. This demonstrates that there is a trade-off between heat transfer enhancement and v...
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International Communications in Heat and Mass Transfer
2012
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| author | Leong, K.Y. Saidur, Rahman Mahlia, T.M.I. Yau, Y.H. |
| author_facet | Leong, K.Y. Saidur, Rahman Mahlia, T.M.I. Yau, Y.H. |
| author_sort | Leong, K.Y. |
| building | UM Library |
| collection | Institutional Repository |
| content_provider | Universiti Malaya |
| content_source | UM Research Repository |
| continent | Asia |
| country | Malaysia |
| description | Due to their improved thermal conductivity, nanofluids have the potential to be used as heat transfer fluids in thermal systems. However adding particles into nanofluids will increase the viscosity of the fluid flow. This demonstrates that there is a trade-off between heat transfer enhancement and viscosity. It might not be ideal to achieve a heat transfer enhancement along with a relatively high pumping power. This study presents an analytical investigation on the entropy generation of a nanofluid flow through a circular tube with a constant wall temperature. Nanofluid thermo-physical properties are obtained from literature or calculated from suitable correlations. The present study focuses on water based alumina and titanium dioxide nanofluids. Outcome of the analysis shows that titanium dioxide nanofluids offer lower total dimensionless entropy generation compared to that of alumina nanofluids. Addition of 4 titanium dioxide nanoparticles reduces the total dimensionless entropy generation by 9.7 as compared to only 6.4 reduction observed when using alumina. It is also noted that dimension configurations of the circular tube play a significant role in determining the entropy generation. |
| format | Article |
| id | my.um.eprints-6554 |
| institution | Universiti Malaya |
| publishDate | 2012 |
| publisher | International Communications in Heat and Mass Transfer |
| record_format | eprints |
| spelling | my.um.eprints-65542019-10-25T06:25:04Z http://eprints.um.edu.my/6554/ Entropy generation analysis of nanofluid flow in a circular tube subjected to constant wall temperature Leong, K.Y. Saidur, Rahman Mahlia, T.M.I. Yau, Y.H. TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery Due to their improved thermal conductivity, nanofluids have the potential to be used as heat transfer fluids in thermal systems. However adding particles into nanofluids will increase the viscosity of the fluid flow. This demonstrates that there is a trade-off between heat transfer enhancement and viscosity. It might not be ideal to achieve a heat transfer enhancement along with a relatively high pumping power. This study presents an analytical investigation on the entropy generation of a nanofluid flow through a circular tube with a constant wall temperature. Nanofluid thermo-physical properties are obtained from literature or calculated from suitable correlations. The present study focuses on water based alumina and titanium dioxide nanofluids. Outcome of the analysis shows that titanium dioxide nanofluids offer lower total dimensionless entropy generation compared to that of alumina nanofluids. Addition of 4 titanium dioxide nanoparticles reduces the total dimensionless entropy generation by 9.7 as compared to only 6.4 reduction observed when using alumina. It is also noted that dimension configurations of the circular tube play a significant role in determining the entropy generation. International Communications in Heat and Mass Transfer 2012 Article PeerReviewed Leong, K.Y. and Saidur, Rahman and Mahlia, T.M.I. and Yau, Y.H. (2012) Entropy generation analysis of nanofluid flow in a circular tube subjected to constant wall temperature. International Communications in Heat and Mass Transfer, 39 (8). pp. 1169-1175. ISSN 0735-1933, DOI https://doi.org/10.1016/j.icheatmasstransfer.2012.06.009 <https://doi.org/10.1016/j.icheatmasstransfer.2012.06.009>. http://ac.els-cdn.com/S0735193312001364/1-s2.0-S0735193312001364-main.pdf?_tid=44fce0dc-4023-11e2-b37d-00000aacb35f&acdnat=1354853280_ddb367681819c13a74057c95b539e6ac 10.1016/j.icheatmasstransfer.2012.06.009 |
| spellingShingle | TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery Leong, K.Y. Saidur, Rahman Mahlia, T.M.I. Yau, Y.H. Entropy generation analysis of nanofluid flow in a circular tube subjected to constant wall temperature |
| title | Entropy generation analysis of nanofluid flow in a circular tube subjected to constant wall temperature |
| title_full | Entropy generation analysis of nanofluid flow in a circular tube subjected to constant wall temperature |
| title_fullStr | Entropy generation analysis of nanofluid flow in a circular tube subjected to constant wall temperature |
| title_full_unstemmed | Entropy generation analysis of nanofluid flow in a circular tube subjected to constant wall temperature |
| title_short | Entropy generation analysis of nanofluid flow in a circular tube subjected to constant wall temperature |
| title_sort | entropy generation analysis of nanofluid flow in a circular tube subjected to constant wall temperature |
| topic | TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery |
| url | http://eprints.um.edu.my/6554/ http://ac.els-cdn.com/S0735193312001364/1-s2.0-S0735193312001364-main.pdf?_tid=44fce0dc-4023-11e2-b37d-00000aacb35f&acdnat=1354853280_ddb367681819c13a74057c95b539e6ac |
| url_provider | http://eprints.um.edu.my/ |