High Rayleigh number turbulent convection in a gas near the gas-liquid critical point

Details High Rayleigh number turbulent convection in a gas near the gas-liquid critical point High Rayleigh number turbulent convection in a gas near the gas-liquid critical point

1999-03-16

arxiv.org/abs/chao-dyn/9903021v1

Nonlinear Sciences

Chaotic Dynamics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.83.3641

$SF_6$ in the vicinity of its critical point was used to study turbulent convection up to exceptionally high Rayleigh numbers, $Ra$, (up to $5\cdot 10^{14}$) and to verify for the first time the generalized scaling laws for the heat transport and the large scale circulation velocity as a function of $Ra$ and the Prandtl number, $Pr$, in very wide range of these parameters. The both scaling laws obtained are consistent with theoretical predictions by B.Shraiman and E.Siggia, Phys. Rev. {\bf A 42}, 3650 (1990).

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