Mixed convection boundary-layer stagnation point flow past a vertical stretching/shrinking surface in a nanofluid
A steady two dimensional mixed convection boundary layer flow near a stagnation point on a impermeable vertical stretching/shrinking surface in a nanofluid with controlled nanoparticles volume fraction is investigated numerically. The stretching/shrinking velocity and the ambient fluid velocity are...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017
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| Online Access: | http://psasir.upm.edu.my/id/eprint/62438/1/MIXED.pdf |
| _version_ | 1796977623691165696 |
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| author | Othman, Noor Adila Yacob, Nor Azizah Bachok @ Lati, Norfifah Ishak, Anuar Pop, Ioan |
| author_facet | Othman, Noor Adila Yacob, Nor Azizah Bachok @ Lati, Norfifah Ishak, Anuar Pop, Ioan |
| author_sort | Othman, Noor Adila |
| collection | UPM |
| description | A steady two dimensional mixed convection boundary layer flow near a stagnation point on a impermeable vertical stretching/shrinking surface in a nanofluid with controlled nanoparticles volume fraction is investigated numerically. The stretching/shrinking velocity and the ambient fluid velocity are assumed to vary linearly with the distance from the stagnation-point. The governing partial differential equations are first transformed into ordinary differential equations using a similarity transformation, before being solved numerically using a shooting method. The effects of several physical parameters such as mixed convection parameter, stretching/shrinking parameter, Brownian motion parameter, thermophoresis parameter and Lewis number on the skin friction coefficient, heat and mass transfer rates at the surface as well as the velocity, temperature and concentration profiles are analysed and discussed. It was found that increasing the particular values of the mixed convection parameter tends to increase the skin friction coefficient, heat and mass transfer rates at the surface. The results obtained show that the solution is unique for the stretching surface whereas dual (upper and lower branch) solutions exist for the shrinking surface. It should be mentioned that the solutions obtained are only locally similar. |
| first_indexed | 2024-03-06T09:42:48Z |
| format | Article |
| id | upm.eprints-62438 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T09:42:48Z |
| publishDate | 2017 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | upm.eprints-624382021-04-30T00:09:34Z http://psasir.upm.edu.my/id/eprint/62438/ Mixed convection boundary-layer stagnation point flow past a vertical stretching/shrinking surface in a nanofluid Othman, Noor Adila Yacob, Nor Azizah Bachok @ Lati, Norfifah Ishak, Anuar Pop, Ioan A steady two dimensional mixed convection boundary layer flow near a stagnation point on a impermeable vertical stretching/shrinking surface in a nanofluid with controlled nanoparticles volume fraction is investigated numerically. The stretching/shrinking velocity and the ambient fluid velocity are assumed to vary linearly with the distance from the stagnation-point. The governing partial differential equations are first transformed into ordinary differential equations using a similarity transformation, before being solved numerically using a shooting method. The effects of several physical parameters such as mixed convection parameter, stretching/shrinking parameter, Brownian motion parameter, thermophoresis parameter and Lewis number on the skin friction coefficient, heat and mass transfer rates at the surface as well as the velocity, temperature and concentration profiles are analysed and discussed. It was found that increasing the particular values of the mixed convection parameter tends to increase the skin friction coefficient, heat and mass transfer rates at the surface. The results obtained show that the solution is unique for the stretching surface whereas dual (upper and lower branch) solutions exist for the shrinking surface. It should be mentioned that the solutions obtained are only locally similar. Elsevier 2017-03 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/62438/1/MIXED.pdf Othman, Noor Adila and Yacob, Nor Azizah and Bachok @ Lati, Norfifah and Ishak, Anuar and Pop, Ioan (2017) Mixed convection boundary-layer stagnation point flow past a vertical stretching/shrinking surface in a nanofluid. Applied Thermal Engineering, 115. 1412 - 1417. ISSN 1359-4311 https://www.sciencedirect.com/science/article/abs/pii/S1359431116327375 10.1016/j.applthermaleng.2016.10.159 |
| spellingShingle | Othman, Noor Adila Yacob, Nor Azizah Bachok @ Lati, Norfifah Ishak, Anuar Pop, Ioan Mixed convection boundary-layer stagnation point flow past a vertical stretching/shrinking surface in a nanofluid |
| title | Mixed convection boundary-layer stagnation point flow past a vertical stretching/shrinking surface in a nanofluid |
| title_full | Mixed convection boundary-layer stagnation point flow past a vertical stretching/shrinking surface in a nanofluid |
| title_fullStr | Mixed convection boundary-layer stagnation point flow past a vertical stretching/shrinking surface in a nanofluid |
| title_full_unstemmed | Mixed convection boundary-layer stagnation point flow past a vertical stretching/shrinking surface in a nanofluid |
| title_short | Mixed convection boundary-layer stagnation point flow past a vertical stretching/shrinking surface in a nanofluid |
| title_sort | mixed convection boundary layer stagnation point flow past a vertical stretching shrinking surface in a nanofluid |
| url | http://psasir.upm.edu.my/id/eprint/62438/1/MIXED.pdf |
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