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VOLUME 84, NUMBER 19 P H Y S I C A L R E V I E W L E T T E R S 8 MAY 2000 Heat Transport in Turbulent Rayleigh-Bnard Convection
 

Summary: VOLUME 84, NUMBER 19 P H Y S I C A L R E V I E W L E T T E R S 8 MAY 2000
Heat Transport in Turbulent Rayleigh-Bénard Convection
Xiaochao Xu, Kapil M. S. Bajaj, and Guenter Ahlers
Department of Physics and Quantum Institute, University of California, Santa Barbara, California 93106
(Received 19 January 2000)
We present measurements of the Nusselt number N as a function of the Rayleigh number R in
cylindrical cells with aspect ratios 0.5 # G D d # 12.8 (D is the diameter and d is the height). We
used acetone with a Prandtl number s 4.0 for 105
& R & 4 3 1010
. A fit of a power law N
N0Rgeff
over limited ranges of R yielded values of geff from 0.275 near R 107
to 0.300 near R
1010
. The data are inconsistent with a single power law for N R . For R . 107
they are consistent
with N as21 12
R1 4
1 bs21 7
R3 7

  

Source: Ahlers, Guenter - Department of Physics, University of California at Santa Barbara

 

Collections: Physics