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Ultimate Rayleigh-Bénard and Taylor-Couette turbulence

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We report on recent experimental and numerical findings of ultimate turbulence for the Rayleigh-Bénard (RB) and the Taylor-Couette (TC) system, highlightening the analogy between these two systems. However, in the TC system the onset of the ultimate regime is much earlier than in the RB system as the mechanical forcing in TC is more efficient than the thermal forcing in RB. We also show and explain the logarithmic boundary layer profiles for both systems in the ultimate regime.

Author(s):

Detlef Lohse    
Twente
Netherlands

Siegfried Grossmann    
Univ. Marburg
Germany

Sander Huisman    
Twente
Netherlands

Rodolfo Ostilla Monico    
Twente
Netherlands

Erwin van der Poel    
Twente
Netherlands

Chao Sun    
Twente
Netherlands

Richard Stevens    
Twente
Netherlands