Convection in Rotating Fluids by B. M. Boubnov, G. S. Golitsyn (auth.)

By B. M. Boubnov, G. S. Golitsyn (auth.)

Spatial inhomogeneity of heating of fluids within the gravity box is the reason for all motions in nature: within the surroundings and the oceans on the earth, in astrophysical and planetary gadgets. All ordinary gadgets rotate and convective motions in rotating fluids are of curiosity in lots of geophysical and astrophysical phenomena. in lots of business purposes, too (crystal development, semiconductor manufacturing), heating and rotation are the most mechanisms defining the constitution and caliber of the fabric.
reckoning on the geometry of the structures and the mutual orientation of temperature and gravity box, a number of phenomena will come up in rotating fluids, comparable to usual and oscillating waves, in depth solitary vortices and ordinary vortex grids, interacting vortices and turbulent blending. during this e-book the authors elucidate the actual essence of those phenomena, deciding on and classifying stream regimes within the area of similarity numbers. The theoretical and computational effects are provided purely whilst the implications support to provide an explanation for easy qualitative movement features.
The ebook should be of curiosity to researchers and graduate scholars in fluid mechanics, meteorology, oceanography and astrophysics, crystallography, warmth and mass move.

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To consider the influence of the side wall, Zhong et al (1991) and Ecke at al (1992) made experiments for the water in a cylinder with b = 1. Thermally insulating plexiglas sidewall, sapphire top and copper bottom ( both excellent thermal conductors) were used. They found waves in the rotating frame which take the form of m-armed spirals. 2 and Goldstein et ai, 1992) gives a good agreement with the experiment both in critical Rayleigh number and in the azimuthal mode number m for Ta < 10 7 • Ra To.

25 . 103 . 6 4 a. t====:::~-­ C ~~ To. 12....... 2 4 Figure 2: Stability diagram for the onset of convection for three cases: a and A ordinary and overstability onset for two rigid boundaries, band B - for one rigid other free boundaries, c and C - for two free boundaries. ( After Chandrasekhar, 1961, by permission of Oxford University Press). 2 is the presence of two well defined parts in the dependence Raer(Ta). For Ta :::; 103 the critical Rayleigh number changes only very little and for Ta ::::: 106 the asymptotic behavior Ra er ex: Taf is clear.

3. Digits at the curves denote the variant numbers. Note some features of these curves. At the same dynamical boundary conditions, the curves shift practically parallel to each other (with precision better than 3 per cent) and the transition from one kind of the thermal condition to the other one is equivalent to multiplication of the critical Rayleigh number by a multiplier not depending on the value of the Taylor number (forTa > 106 ). 49· Rucr,f (compare variants 3 and 4,2 and 5). 80· Racr,f for the rigid upper boundary (variants 5 and 7).

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