Results 231 to 240 of about 25,406 (266)

From steady solutions to chaotic flows in a Rayleigh–Bénard problem at moderate Rayleigh numbers

Physica D: Nonlinear Phenomena, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Puigjaner, D., Herrero, J., Simó, C., Giralt, F.   +3 more
openaire   +2 more sources

Experimental study of non-Boussinesq Rayleigh–Bénard convection at high Rayleigh and Prandtl numbers

Physics of Fluids, 1999
A set of experiments is performed, in which a layer of fluid is heated from below and cooled from above, in order to study convection at high Rayleigh numbers (Ra) and Prandtl numbers (Pr). The working fluid, corn syrup, has a viscosity that depends strongly on temperature.
Manga, Michael, Weeraratne, Dayanthie
openaire   +2 more sources

Laminar convection cells at high Rayleigh number

Journal of Fluid Mechanics, 1969
The asymptotic behaviour for large Rayleigh number and Prandtl number of O(1) of two-dimensional convection cells in a fluid between horizontal plates heated from below has been discussed by Pillow (1952) and more recently by Robinson (1967). The flow models derived by Pillow and Robinson differ from each other.
openaire   +3 more sources

Salt fingers at low Rayleigh numbers

Journal of Fluid Mechanics, 2002
This is a laboratory study of salt fingers at low Rayleigh numbers. We report on the stability boundary in the (RS, RT)-plane (where RS and RT are the salt and heat Rayleigh numbers respectively), the wavenumber of the observed fingers, and the planform. In this low RS, RT range, fingers have width comparable to their height, as predicted by linear
KRISHNAMURTI R., Y. H. JO, STOCCHINO, ALESSANDRO   +2 more
openaire   +3 more sources

High Rayleigh number β-convection

Geophysical & Astrophysical Fluid Dynamics, 1993
Abstract High resolution numerical simulations of thermal convection in a rapidly rotating channel with gravity perpendicular to the rotation vector are described. The convecting columns are subject to a β-effect resulting from topographic vortex stretching.
Nicholas H. Brummell, J. E. Hart
openaire   +1 more source

Scaling in magnetohydrodynamic convection at high Rayleigh number

Physical Review E, 2006
The theory of Grossmann and Lohse [J. Fluid Mech. 407, 27 (2000)] is extended to include the effect of a magnetic field on convection of an electrically conducting fluid. Different scaling laws are obtained depending on whether the bulk or the boundary layers make the major contribution to the dissipation. Scalings are obtained for both weak and strong
openaire   +2 more sources

A computational study of Rayleigh–Bénard convection. Part 1. Rayleigh-number scaling

Journal of Fluid Mechanics, 1991
A parametric study is made of chaotic Rayleigh–Bénard convection over moderate Rayleigh numbers. As a basis for comparison over the Rayleigh number (Ra) range we consider mean quantities, r.m.s. fluctuations, Reynolds number, probability distributions and power spectra.
Anil E. Deane, Lawrence Sirovich
openaire   +1 more source

Definition of the Rayleigh number for geodynamo simulation

Physics of the Earth and Planetary Interiors, 2001
Abstract A single nondimensional parameter, the Rayleigh number, suffices to characterize the onset of convection in a fluid layer of constant thickness. Geodynamo simulations concern much more complicated situations in which the fluid motions occur in a rapidly rotating sphere or spherical shell.
Masaru Kono, Paul H. Roberts
openaire   +1 more source

The Rayleigh number for convection in the Earth’s core

Physics of the Earth and Planetary Interiors, 2001
Abstract Geodynamo models depend on two important parameters: the Ekman and Rayleigh numbers. While the difficulty of simulating a geodynamo with very small Ekman number has been widely discussed, the Rayleigh number has received relatively little attention.
openaire   +1 more source

Comments on high Rayleigh number convection

2001
We have recently conducted a series of experiments on turbulent convection in the range of Rayleigh numbers between 106 and 1017 (Niemela et al. 1999). The working fluid is cryogenic helium gas. The eleven decades of dynamic range enable us to make a few conclusive observations. Among them, the following aspects are noteworthy.
J. J. Niemela, L. Skrbek, K. R. Sreenivasan, R. J. Donnelly   +3 more
openaire   +1 more source