These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Heat transport in the geostrophic regime of rotating Rayleigh-Bénard convection.
    Author: Ecke RE, Niemela JJ.
    Journal: Phys Rev Lett; 2014 Sep 12; 113(11):114301. PubMed ID: 25259983.
    Abstract:
    We report experimental measurements of heat transport in rotating Rayleigh-Bénard convection in a cylindrical convection cell with an aspect ratio of Γ=1/2. The fluid is helium gas with a Prandtl number Pr=0.7. The range of control parameters for Rayleigh numbers 4×10^{9}<Ra<4×10^{11} and for Ekman numbers 2×10^{-7}<Ek<3×10^{-5} (corresponding to Taylor numbers 4×10^{9}<Ta<1×10^{14} and convective Rossby numbers 0.07<Ro<5). We determine the transition from weakly rotating turbulent convection to rotation dominated geostrophic convection through experimental measurements of the heat transport Nu. The heat transport, best collapsed using a parameter RaEk^{β} with 1.65<β<1.8, defines two boundaries in the phase diagram of Ra/Ra_{c} versus Ek and elucidates properties of the geostrophic turbulence regime of rotating thermal convection. We find Nu∼(Ra/Ra_{c})^{γ} with γ≈1 from direct measurement and 1.2<γ<1.6 inferred from scaling arguments.
    [Abstract] [Full Text] [Related] [New Search]