dc.contributor.author |
Moulai, S.
|
|
dc.contributor.author |
Korichi, A.
|
|
dc.contributor.author |
Fohanno, S.
|
|
dc.contributor.author |
Polidori, G.
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dc.date.accessioned |
2015-04-23T06:33:32Z |
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dc.date.available |
2015-04-23T06:33:32Z |
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dc.date.issued |
2014 |
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dc.description.abstract |
Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014. |
en_ZA |
dc.description.abstract |
This paper investigates numerically the flow and heat transfer in air (Pr=0.71) by mixed convection past a heated square cylinder under aiding buoyancy effect in a confined channel. The numerical simulations are performed in the range of parameters 20≤Re≤45 and 1.61x103 ≤Gr≤6.33x103for a fixed blockage ratio D/L of 0.1. The combination in the present study of these two Re and Gr parameters is reduced so that the Richarson number varies from 0,8 to 8, in order to neglect neither free convection (Ri<0.1) nor forced convection (Ri>10). The steady two-dimensional governing equations are solved by the finite volume formulation using the open source OpenFoam® code. The representative flow structure, isotherm patterns and local Nusselt number evolution are presented and discussed. The effect of both the Reynolds number and the buoyancy parameter on the fluid flow and the heat transfer are also analyzed. It is found that the wake region size strongly depends on both Reynolds and Grashof numbers and this region is shown to increase in size increasing the Reynolds number and/or decreasing the Grashof number. Moreover, increasing the Reynolds number leads to a heat transfer enhancement more pronounced on the front face of the obstacle, whereas increasing the Grashof number leads to a heat transfer enhancement more pronounced on the side faces. |
en_ZA |
dc.description.librarian |
dc2015 |
en_ZA |
dc.format.extent |
8 pages |
en_ZA |
dc.format.medium |
PDF |
en_ZA |
dc.identifier.citation |
Moulai, S, Korichi, A, Fohanno, S & Polidori, G 2014, 'Buoyancy-assisted mixed convection flow over a heated square cylinder in a vertical channel', Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014. |
en_ZA |
dc.identifier.isbn |
97817759206873 |
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dc.identifier.uri |
http://hdl.handle.net/2263/44475 |
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dc.publisher |
International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics |
en_ZA |
dc.rights |
© 2014 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
en_ZA |
dc.subject |
Heat transfer |
en_ZA |
dc.subject |
Mixed convection |
en_ZA |
dc.subject |
Buoyancy effect |
en_ZA |
dc.subject |
Richarson number |
en_ZA |
dc.subject |
OpenFoam® code |
en_ZA |
dc.subject |
Isotherm patterns |
en_ZA |
dc.subject |
Nusselt number |
en_ZA |
dc.subject |
Fluid flow |
en_ZA |
dc.title |
Buoyancy-assisted mixed convection flow over a heated square cylinder in a vertical channel |
en_ZA |
dc.type |
Presentation |
en_ZA |