Transitions between turbulent states in rotating Rayleigh-Bénard convection

Richard Johannes Antonius Maria Stevens, Jin-Qiang Zhong, H.J.H. Clercx, Günter Ahlers, Detlef Lohse

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Abstract

Weakly rotating turbulent Rayleigh-Bénard convection was studied experimentally and numerically. With increasing rotation and large enough Rayleigh number a supercritical bifurcation from a turbulent state with nearly rotation-independent heat transport to another with enhanced heat transfer is observed at a critical inverse Rossby number 1/Ro_c≃0.4. The strength of the large-scale convection roll is either enhanced or essentially unmodified depending on parameters for 1/Ro < 1/Ro_c, but the strength increasingly diminishes beyond 1/Ro_c where it competes with Ekman vortices that cause vertical fluid transport and thus heat-transfer enhancement.
Original languageUndefined
Article number10.1103/PhysRevLett.103.024503
Pages (from-to)024503
Number of pages4
JournalPhysical review letters
Volume103
Issue number2
DOIs
Publication statusPublished - Jul 2009

Keywords

  • EWI-17332
  • METIS-257711
  • IR-69754

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