Results 21 to 30 of about 24,757 (267)
Large Scale Structures in Rayleigh-Bénard Convection at High Rayleigh Numbers
Physical Review Letters, 2003 Direct numerical simulations of Rayleigh-Bénard convection in a plane layer with periodic boundary conditions at Rayleigh numbers up to 10(7) show that flow structures can be objectively classified as large or small scale structures because of a gap in spatial spectra. The typical size of the large scale structures does not always vary monotonically as
Hartlep, T. +2 more
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Marginal Stability of Oscillatory Bénard-Marangoni Convection With Internal Heat Generation
Journal of Computing Research and Innovation, 2023 The onset of oscillatory Benard-Marangoni convection in a horizontal fluid layer with internal heat generation and a deformable free surface is studied using an analytical technique employing the classical linear stability theory.
Mohamad Najib Mohamad Fadzil +1 more
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A boundary-layer analysis of Rayleigh-Bénard convection at large Rayleigh number
Journal of Fluid Mechanics, 1987 A boundary-layer analysis is presented for the two-dimensional nonlinear convection of an infinite-Prandtl-number fluid in a rectangular enclosure, in the limit of large Rayleigh numbers. Particular emphasis is given to the analysis of the periodic boundary layers, and on the removal of the singularities that appear near the corners of the cell.
Jiménez Sendín, Javier +1 more
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Plume structure in high-Rayleigh-number convection [PDF]
Journal of Fluid Mechanics, 2005 Near-wall structures in turbulent natural convection at Rayleigh numbers of $10^{10}$ to $10^{11}$ at A Schmidt number of 602 are visualized by a new method of driving the convection across a fine membrane using concentration differences of sodium chloride. The visualizations show the near-wall flow to consist of sheet plumes.
Puthenveettil, Baburaj A +1 more
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Penetrative convection at high Rayleigh numbers
Physical Review Fluids, 2018 We study penetrative convection of a fluid confined between two horizontal plates, the temperatures of which are such that a temperature of maximum density lies between them. The range of Rayleigh numbers studied is $Ra = \left[10^6, 10^8 \right]$ and the Prandtl numbers are $Pr = 1$ and $11.6$.
Toppaladoddi, S, Wettlaufer, J
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Electro-Hydrodynamic Convection in a Rotating Dielectric Micropolar Fluid Layer
International Journal of Applied Mechanics and Engineering, 2019 Thermal convection of a rotating dielectric micropolar fluid layer under the action of an electric field and temperature gradient has been investigated. The dispersion relation has been derived using normal mode analysis.
H. Kaur, G.N Verma
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Variable Gravity Effects on Thermal Instability of Nanofluid in Anisotropic Porous Medium
International Journal of Applied Mechanics and Engineering, 2013 In this paper, we study the effects of variable gravity on thermal instability in a horizontal layer of a nanofluid in an anisotropic porous medium. Darcy model been used for the porous medium.
R. Chand, G.C. Rana, S. Kumar
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Prandtl-number Effects in High-Rayleigh-number Spherical Convection [PDF]
The Astrophysical Journal, 2018 Abstract Convection is the predominant mechanism by which energy and angular momentum are transported in the outer portion of the Sun. The resulting overturning motions are also the primary energy source for the solar magnetic field. An accurate solar dynamo model therefore requires a complete description of the convective motions, but ...
Ryan J. Orvedahl +3 more
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Prandtl-, Rayleigh-, and Rossby-number dependence of heat transport in turbulent Rotating Rayleigh-Bénard convection [PDF]
Physical Review Letters, 2009 Experimental and numerical data for the heat transfer as a function of the Rayleigh-, Prandtl-, and Rossby numbers in turbulent rotating Rayleigh-Benard convection are presented. For relatively small $Ra ~ 10^8$ and large Pr modest rotation can enhance the heat transfer by up to 30%. At larger Ra there is less heat-transfer enhancement, and at small Pr
Zhong, JQ +5 more
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A study of Free Convection in A solar Chimney Model [PDF]
Engineering and Technology Journal, 2011 A solar chimney is a hot air channel attached to a circular translucent roof opens at the periphery. The roof and the ground below it form an air collector. It enhances natural ventilation by employing air temperature difference between channal inlet and
Sabah Tarik Ahmed, Miqdam Tariq Chaichan
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