Heat Transport Scaling in Turbulent Rayleigh-Bénard Convection: Effects of Rotation and Prandtl Number (original) (raw)
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Abstract
We report experimental measurements of turbulent heat transport in rotating Rayleigh-Bénard convection. The fluid was water with Prandtl number 3<σ<7. Heat transport and local temperature measurements were made for Rayleigh numbers 2×105<Ra<5×108 and Taylor numbers 0<=Ta<=5×109. For fixed convective Rossby numbers Ro between 0.1 and 1.5, the Nusselt number N scaled closely as the 2/7 power of Ra but had very little variation with the Prandtl number σ and only a moderate increase with increasing rotation rate. Substantial disagreement is found with existing scaling theories.
Publication:
Physical Review Letters
Pub Date:
September 1997
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