TITLE

Turbulent thermal convection at high Rayleigh numbers for a Boussinesq fluid of constant Prandtl number

AUTHOR(S)
Amati, G.; Koal, K.; Massaioli, F.; Sreenivasan, K. R.; Verzicco, R.
PUB. DATE
December 2005
SOURCE
Physics of Fluids;Dec2005, Vol. 17 Issue 12, p121701
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The results from direct numerical simulations of turbulent Boussinesq convection are briefly presented. The flow is computed for a cylindrical cell of aspect ratio 1/2 in order to compare with the results from recent experiments. The results span eight decades of Ra from 2×106 to 2×1014 and form the baseline data for a strictly Boussinesq fluid of constant Prandtl number (Pr=0.7). A conclusion is that the Nusselt number varies nearly as the 1/3 power of Ra for about four decades towards the upper end of the Ra range covered.
ACCESSION #
19443581

 

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