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Physics 2, 74 (2009) Turbulent convection

Summary: Physics 2, 74 (2009)
Turbulent convection
Guenter Ahlers
Department of Physics, University of California, Santa Barbara, CA 93106, USA
Published September 14, 2009
Convection in a fluid heated from below, known as Rayleigh-Bénard convection, is an important turbulent pro-
cess that occurs in the sun, planetary atmospheres, industrial manufacturing, and many other places. Physicists
and engineers have made much progress in understanding this phenomenon in simple laboratory geometries,
but still have a way to go before they are able to extrapolate to the extreme conditions often encountered in
Subject Areas: Fluid Dynamics
Turbulent convection in a fluid heated from below
and cooled from above, called Rayleigh-Bénard con-
vection [1, 2], plays a major role in numerous natural
and industrial processes. Beyond a particular temper-
ature difference, the heated fluid rises and the cooled
fluid falls, thereby forming one or more convection cells.
Increasing the difference causes the well-defined cells
to become turbulent. Turbulent convection occurs in


Source: Ahlers, Guenter - Department of Physics, University of California at Santa Barbara


Collections: Physics