Comments on “High Rayleigh number convection in an enclosure—A numerical study”
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چکیده
منابع مشابه
Numerical study of high Rayleigh number convection in a medium with depth-dependent viscosity
The equations of motion are solved numerically for a Boussinesq fluid with infinite Prandtl number in a square 2-D box where the viscosity increases with depth. Three heating modes are employed: bottom heating, internal heating, and half bottom and half internal heating. In all cases the boundaries are free slip. The range of Rayleigh numbers employed is 10-107. The viscosity increases as 10{3(...
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Entropy generation in two-dimensional Rayleigh-Bénard convection at different Prandtl number (Pr) are investigated in the present paper by using the lattice Boltzmann Method. The major concern of the present paper is to explore the effects of Pr on the detailed information of local distributions of entropy generation in virtue of frictional and heat transfer irreversibility and the overall entr...
متن کاملHigh-Rayleigh-number convection in a fluid-saturated porous layer
By JESSE OTERO, LUBOMIRA A. DONTCHEVA, HANS JOHNSTON, RODNEY A. WORTHING, ALEXANDER KURGANOV, GUERGANA PETROVA AND CHARLES R. DOERING 3,7 Department of Mathematics, Ohio State University, Columbus, OH 43210, USA Department of Computer Science & Engineering, University of Washington, Seattle, WA 98195-2350, USA Department of Mathematics, University of Michigan, Ann Arbor, MI 48109-1109, USA Brea...
متن کاملHigh Rayleigh number convection in a three-dimensional porous medium
High-resolution numerical simulations of statistically steady convection in a threedimensional porous medium are presented for Rayleigh numbers Ra 6 2 × 104. Measurements of the Nusselt number Nu in the range 1750 6 Ra 6 2× 104 are well fitted by a relationship of the form Nu= α3Ra+ β3, for α3= 9.6× 10−3 and β3= 4.6. This fit indicates that the classical linear scaling Nu∼ Ra is attained, and t...
متن کاملMultifractal nature of plume structure in high Rayleigh number convection
The geometrically different plan forms of near wall plume structure in turbulent natural convection, visualised by driving the convection using concentration differences across a membrane, are shown to have a common multifractal spectrum of singularities for Rayleigh numbers in the range 10 − 10 at Schmidt number of 602. The scaling is seen for a length scale range of 2 and is independent of th...
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ژورنال
عنوان ژورنال: Physics of Fluids
سال: 1974
ISSN: 0031-9171
DOI: 10.1063/1.1694816