Simulation of Turbulent Convection at High Rayleigh Numbers
نویسندگان
چکیده
منابع مشابه
Turbulent convection at high Rayleigh numbers and aspect ratio 4
We report measurements of the Nusselt number, Nu, in turbulent thermal convection in a cylindrical container of aspect ratio 4. The highest Rayleigh number achieved was Ra=2× 10. Except for the last half a decade or so of Ra, experimental conditions obey the Boussinesq approximation accurately. For these conditions, the data show that the logNu–logRa slope saturates at a value close to 1/3, as ...
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In the original paper by Ahlers et al (2009 New J. Phys. 11 123001) a transition was reported at a Rayleigh number Ra = Ra ' 4× 1013. For Ra > Ra, the Nusselt number Nu rose less rapidly with increasing Ra than it did below Ra. In a note added in proof the authors reported the subsequent discovery of a coexisting additional ‘upper branch’ where Nu increased more rapidly with Ra. This addendum r...
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ژورنال
عنوان ژورنال: Modelling and Simulation in Engineering
سال: 2018
ISSN: 1687-5591,1687-5605
DOI: 10.1155/2018/5781602