Relative velocity fluctuations in turbulent Rayleigh-Bénard convection
- 5 October 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 69 (14), 2066-2069
- https://doi.org/10.1103/physrevlett.69.2066
Abstract
High-Rayleigh-number turbulent convection has been studied using the technique of photon-correlation homodyne spectroscopy to measure velocity differences at various length scales. The measured intensity correlation function G(q,t,L) is found to be of the scaling form G(qu(L)t), with u(L)∼ being the characteristic turbulent velocity at the legth scale L and q the scattering vector. It is also found that the lower cutoff length of the scaling range obeys a power law ∼. The measured power-law exponents are in excellent agreement with theoretical predictions.
Keywords
This publication has 15 references indexed in Scilit:
- Spectra of velocity and temperature fluctuations with constant entropy flux of fully developed free-convective turbulencePhysical Review Letters, 1991
- Thermal boundary layers and heat flux in turbulent convection: The role of recirculating flowsPhysical Review A, 1991
- Heat transport in high-Rayleigh-number convectionPhysical Review A, 1990
- Sheared boundary layers in turbulent Rayleigh-Bénard convectionPhysical Review Letters, 1990
- Frequency power spectrum of temperature fluctuations in free convectionPhysical Review Letters, 1990
- Scaling of hard thermal turbulence in Rayleigh-Bénard convectionJournal of Fluid Mechanics, 1989
- On the scaling laws of thermal turbulent convectionPhysics of Fluids A: Fluid Dynamics, 1989
- Scaling exponents in nonisotropic convective turbulencePhysical Review Letters, 1989
- Transitions to turbulence in helium gasPhysical Review A, 1987
- A simple dynamical model of intermittent fully developed turbulenceJournal of Fluid Mechanics, 1978