منابع مشابه
Rayleigh-bénard convection
This paper presents a physicist’s approach to Rayleigh-Bbnard convection widely illustrated with experimental results. The basis of the mechanism of the instability is simply presented with physical reasons for the existence of a critical threshold. A detailed examination of the spatial organization is made with discussion of ordered and disordered structures. Furthermore it is shown that the m...
متن کاملHomogeneous Rayleigh-Bénard convection
Much effort has been expended in recent decades in addressing the problem of heat transfer in Rayleigh-Bénard (RB) thermal convection cells. There is increasing agreement that in general there are no clean scaling laws for Nu(Ra, Pr) and Re(Ra, Pr), apart from asymptotic cases. One of these asymptotic cases has been doped the ultimate state of thermal convection, i.e. Ra → ∞, where the heat flu...
متن کاملUnsteady Heating of Rayleigh-Benard Convection
The linear thermal instability of a horizontal fluid layer with time-periodic temperature distribution is studied with the help of the Floquet theory. The time-dependent part of the temperature has been expressed in Fourier series. Disturbances are assumed to be infinitesimal. Only even solutions are considered. Numerical results for the critical Rayleigh number are obtained at various Prandtl ...
متن کاملMechanisms of Instability in Rayleigh-bénard Convection
To my family.. iii ACKNOWLEDGEMENTS There are many people whom I would like to acknowledge for their help and support as I made my way through this thesis work. Mike Schatz, my advisor, deserves much credit for the genesis of my research project. Mike's research model of each student being responsible for his or her experiment, the development of necessary computer programs, data acquisition an...
متن کاملExtensive chaos in Rayleigh-Bénard convection.
Using large-scale numerical calculations we explore spatiotemporal chaos in Rayleigh-Bénard convection for experimentally relevant conditions. We calculate the spectrum of Lyapunov exponents and the Lyapunov dimension describing the chaotic dynamics of the convective fluid layer at constant thermal driving over a range of finite system sizes. Our results reveal that the dynamics of fluid convec...
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ژورنال
عنوان ژورنال: Scholarpedia
سال: 2012
ISSN: 1941-6016
DOI: 10.4249/scholarpedia.7702