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Study of natural convection in inclined square enclosures with uniform heat generation

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Title Study of natural convection in inclined square enclosures with uniform heat generation
 
Creator KULKARNI, M
MITRA, SK
GAITONDE, UN
 
Subject energy-sources
cavity
laminar
 
Description Two-dimensional laminar natural convection in an inclined square enclosure with uniform internal heat generation is studied here. The steady-state solutions are obtained for inclination angles of 45 degrees,30 degrees and 15 degrees and at Rayleigh number of 1.5 x 10(5). For these cases, the two counter-rotating rolls of fluid are present in the cavity. Streamlines, isotherms and heat transfer for these results are compared with the existing experimental results and are found to be in reasonably good agreement. It is found that the location of maximum non-dimensional temperature in the inclined cavity is higher than that for pure conduction case. The maximum non-dimensional temperature in the cavity decreases as the Rayleigh number increases. For Ra > 5 x 10(4), the maximum non-dimensional temperature in inclined cavity is almost independent of the inclination angle. It is also observed that the local Nusselt number at the top wall is greater than the pure conduction solution, whereas that for bottom wall it is lower than the Nusselt number for pure conduction. The effect of Rayleigh number and inclination angle on the local Nusselt number and modified local Nusselt number are also studied. For horizontal cavity, at Rayleigh number greater than or equal to 5 x 104, periodic solutions are obtained. In this case, two unstable secondary rolls are present near the center of top wall, in addition to the primary rolls. The secondary rolls are dissipated and recreated during one period of oscillation.
 
Publisher AMER SOC MECHANICAL ENGINEERS
 
Date 2011-10-26T08:10:32Z
2011-12-15T09:12:10Z
2011-10-26T08:10:32Z
2011-12-15T09:12:10Z
2007
 
Type Proceedings Paper
 
Identifier PROCEEDINGS OF THE ASME/JSME THERMAL ENGINEERING SUMMER HEAT TRANSFER CONFERENCE 2007, VOL 1,1085-1090
978-0-7918-4274-4
http://dspace.library.iitb.ac.in/xmlui/handle/10054/15951
http://hdl.handle.net/100/2505
 
Source 7th ASME/JSME Thermal Engineering and Summer Heat Transfer Conference,Vancouver, CANADA,JUL 08-12, 2007
 
Language English