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

doi:10.1063/1.2140023

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 journal › Article › peer-review

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 language	English (US)
Article number	121701
Pages (from-to)	1-4
Number of pages	4
Journal	Physics of Fluids
Volume	17
Issue number	12
DOIs	https://doi.org/10.1063/1.2140023
State	Published - Dec 2005

ASJC Scopus subject areas

Computational Mechanics
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Fluid Flow and Transfer Processes

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10.1063/1.2140023

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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.",

author = "G. Amati and K. Koal and F. Massaioli and Sreenivasan, {K. R.} and R. Verzicco",

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AU - Amati, G.

AU - Koal, K.

AU - Massaioli, F.

AU - Sreenivasan, K. R.

AU - Verzicco, R.

PY - 2005/12

Y1 - 2005/12

N2 - 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.

AB - 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.

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

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