Practical laws for natural convection of viscous fluids heated from above in a shallow cavity
نویسندگان
چکیده
منابع مشابه
Natural convection in a shallow cavity with differentially heated end walls. Part 1. Asymptotic theory
The problem of natural convection in a cavity of small aspect ratio with differentially heated end walls is considered. It is shown by use of matched asymptotic expansions that the flow consists of two distinct regimes : a parallel flow in the core region and a second, non-parallel flow near the ends of the cavity. A solution valid at all orders in the aspect ratio A is found for the core regio...
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Numerical solutions of the full Navier-Stokes equations are obtained for the problem of natural convection in closed cavities of small aspect ratio with differentially heated end walls. These solutions cover the parameter range Pr = 6.983, 10 6 Gr d 2 x lo4 and 0.05 4 A d 1. A comparison with the asymptotic theory of part 1 shows excellent agreement between the analytical and numerical solution...
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Laminar natural convection in a trapezoidal cavity filled with various fluids is studied numerically using a finite volume method. The cavity inclined left and right sidewalls are maintained at constant cold temperature while the top wall is maintained at constant hot temperature. The bottom wall is considered adiabatic. Fluid flow fields , isotherm patterns and the average Nusselt number are p...
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An extensive reasoned review of the results available in the literature for free convection heat transfer from a heated flat plate facing upwards, is conducted. The review is organized in the form of a table, so as to give the reader the opportunity to compare the heat transfer data, expressed through dimensionless equations, as well as the conditions under which these data were obtained. A com...
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Heat transfer resulting from the natural convection in a fluid layer contained in an infinite horizontal slot bounded by solid walls and subject to a spatially periodic heating at the lower wall has been investigated. The heating produces sinusoidal temperature variations along one horizontal direction characterized by the wave number α with the amplitude expressed in terms of a suitably define...
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ژورنال
عنوان ژورنال: International Journal of Heat and Mass Transfer
سال: 2012
ISSN: 0017-9310
DOI: 10.1016/j.ijheatmasstransfer.2011.09.042