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Natural convection in an inclined enclosure. (English) Zbl 1064.76613

Summary: The effect of inclination on laminar natural convection in a square cavity is studied numerically for inclination angles ranging from 40\(^\circ\) to 160\(^\circ\), Rayleigh numbers between 103 and 106 and Prandtl numbers from 0.02 to 4,000. Contours of stream functions and temperature are presented in order to provide a new insight and a better understanding of the flow and heat transfer characteristics in a square cavity. Finds computed local and mean Nusselt numbers at the hot wall in satisfactory agreement with experimental and other numerical results. Finds that the mean heat flux at the hot wall as well as the distribution of the local heat flux along the heated wall depend on the inclination angle, the Rayleigh number and the Prandtl number. Such a dependence is significant for angles greater than \(90^\circ\), while for smaller angles the effect of the inclination angle on the Nusselt-Rayleigh correlation is weaker.

MSC:

76R10 Free convection
76M12 Finite volume methods applied to problems in fluid mechanics
80A20 Heat and mass transfer, heat flow (MSC2010)
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