Heat Transport Scaling in Turbulent Rayleigh-B{acute e}nard Convection: Effects of Rotation and Prandtl Number
- Condensed Matter Thermal Physics Group and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
We report experimental measurements of turbulent heat transport in rotating Rayleigh-B{acute e}nard convection. The fluid was water with Prandtl number 3{lt}{sigma}{lt}7 . Heat transport and local temperature measurements were made for Rayleigh numbers 2{times}10{sup 5}{lt}Ra{lt}5{times}10{sup 8} and Taylor numbers 0{le}Ta{le}5{times}10{sup 9} . 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 {sigma} and only a moderate increase with increasing rotation rate. Substantial disagreement is found with existing scaling theories. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 542665
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
Similar Records
Spiral-Defect Chaos in Rayleigh-B{acute e}nard Convection with Small Prandtl Numbers
Transient states during spin-up of a Rayleigh{endash}B{acute e}nard cell