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

G. Amati, K. Koal, F. Massaioli, K. R. Sreenivasan, R. Verzicco

Research output: Contribution to journalArticle

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.

Original languageEnglish (US)
Article number121701
Pages (from-to)1-4
Number of pages4
JournalPhysics of Fluids
Volume17
Issue number12
DOIs
StatePublished - Dec 2005

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Prandtl number
Direct numerical simulation
Rayleigh number
Nusselt number
direct numerical simulation
free convection
aspect ratio
Aspect ratio
convection
Fluids
fluids
cells
Experiments
Convection
Hot Temperature

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Mechanics
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes
  • Condensed Matter Physics

Cite this

Turbulent thermal convection at high Rayleigh numbers for a Boussinesq fluid of constant Prandtl number. / Amati, G.; Koal, K.; Massaioli, F.; Sreenivasan, K. R.; Verzicco, R.

In: Physics of Fluids, Vol. 17, No. 12, 121701, 12.2005, p. 1-4.

Research output: Contribution to journalArticle

Amati, G. ; Koal, K. ; Massaioli, F. ; Sreenivasan, K. R. ; Verzicco, R. / Turbulent thermal convection at high Rayleigh numbers for a Boussinesq fluid of constant Prandtl number. In: Physics of Fluids. 2005 ; Vol. 17, No. 12. pp. 1-4.
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