Laminar mixed convection of Cu-water nano-fluid in two- sided lid-driven enclosures
The fluid flow and heat transfer in lid-driven enclosures filled with Cu-water nanofluid is numerically investigated. The moving vertical walls of the enclosure are maintained in a constant temperature, while the horizontal walls are insulated. The hybrid scheme is used to discretize the convection...
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| Format: | Article |
| Language: | English |
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Nanoscience and Nanotechnology Research Center, University of Kashan
2011-01-01
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| Series: | Journal of Nanostructures |
| Subjects: | |
| Online Access: | http://jns.kashanu.ac.ir/article_5244_00ece7bd37b152ad938407177491f64e.pdf |
| _version_ | 1828382025674915840 |
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| author | N. Hajialigol G. A. Sheikhzadeh M. Ebrahim Qomi A. Fattahi |
| author_facet | N. Hajialigol G. A. Sheikhzadeh M. Ebrahim Qomi A. Fattahi |
| author_sort | N. Hajialigol |
| collection | DOAJ |
| description | The fluid flow and heat transfer in lid-driven enclosures filled with Cu-water nanofluid is numerically investigated. The moving vertical walls of the enclosure are maintained in a constant temperature, while the horizontal walls are insulated. The hybrid scheme is used to discretize the convection terms and SIMPLER algorithm is adopted to couple the velocity field and pressure in the momentum equations. The effect of moving direction of walls on mixed convection is studied for various Ri numbers, aspect ratios and volume fractions of nanoparticles. For this purpose, vertical walls are moved in two directions: one, force convection aids to free convection and two, it interacts to free convection. It is observed that the direction of moving wall mainly affected the flow field, temperature gradient and heat transfer. In addition, by increasing the volume fraction of nanoparticles, the variation of average Nusselt number on the hot wall, as an index of heat transfer rate, is linear in two cases. |
| first_indexed | 2024-12-10T04:25:26Z |
| format | Article |
| id | doaj.art-e236c3df609e4250964a30a07781130f |
| institution | Directory Open Access Journal |
| issn | 2251-7871 2251-788X |
| language | English |
| last_indexed | 2024-12-10T04:25:26Z |
| publishDate | 2011-01-01 |
| publisher | Nanoscience and Nanotechnology Research Center, University of Kashan |
| record_format | Article |
| series | Journal of Nanostructures |
| spelling | doaj.art-e236c3df609e4250964a30a07781130f2022-12-22T02:02:18ZengNanoscience and Nanotechnology Research Center, University of KashanJournal of Nanostructures2251-78712251-788X2011-01-0111445310.7508/jns.2011.01.0075244Laminar mixed convection of Cu-water nano-fluid in two- sided lid-driven enclosuresN. Hajialigol0G. A. Sheikhzadeh1M. Ebrahim Qomi2A. Fattahi3Department of Mechanical Engineering, University of Kashan,Ghotb Ravandi Blvd, Kashan, 87317-51167, Iran.Department of Mechanical Engineering, University of Kashan,Ghotb Ravandi Blvd, Kashan, 87317-51167, Iran.Department of Mechanical Engineering, University of Kashan,Ghotb Ravandi Blvd, Kashan, 87317-51167, Iran.Department of Mechanical Engineering, University of Kashan,Ghotb Ravandi Blvd, Kashan, 87317-51167, Iran.The fluid flow and heat transfer in lid-driven enclosures filled with Cu-water nanofluid is numerically investigated. The moving vertical walls of the enclosure are maintained in a constant temperature, while the horizontal walls are insulated. The hybrid scheme is used to discretize the convection terms and SIMPLER algorithm is adopted to couple the velocity field and pressure in the momentum equations. The effect of moving direction of walls on mixed convection is studied for various Ri numbers, aspect ratios and volume fractions of nanoparticles. For this purpose, vertical walls are moved in two directions: one, force convection aids to free convection and two, it interacts to free convection. It is observed that the direction of moving wall mainly affected the flow field, temperature gradient and heat transfer. In addition, by increasing the volume fraction of nanoparticles, the variation of average Nusselt number on the hot wall, as an index of heat transfer rate, is linear in two cases.http://jns.kashanu.ac.ir/article_5244_00ece7bd37b152ad938407177491f64e.pdfLid‐driven enclosureLaminar mixed convectionNanofluidAspect ratio |
| spellingShingle | N. Hajialigol G. A. Sheikhzadeh M. Ebrahim Qomi A. Fattahi Laminar mixed convection of Cu-water nano-fluid in two- sided lid-driven enclosures Journal of Nanostructures Lid‐driven enclosure Laminar mixed convection Nanofluid Aspect ratio |
| title | Laminar mixed convection of Cu-water nano-fluid in two- sided lid-driven enclosures |
| title_full | Laminar mixed convection of Cu-water nano-fluid in two- sided lid-driven enclosures |
| title_fullStr | Laminar mixed convection of Cu-water nano-fluid in two- sided lid-driven enclosures |
| title_full_unstemmed | Laminar mixed convection of Cu-water nano-fluid in two- sided lid-driven enclosures |
| title_short | Laminar mixed convection of Cu-water nano-fluid in two- sided lid-driven enclosures |
| title_sort | laminar mixed convection of cu water nano fluid in two sided lid driven enclosures |
| topic | Lid‐driven enclosure Laminar mixed convection Nanofluid Aspect ratio |
| url | http://jns.kashanu.ac.ir/article_5244_00ece7bd37b152ad938407177491f64e.pdf |
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