旋转瑞利-贝纳德对流地转 regime 中的热传输。 （注：“regime”常见释义为“政权；政体；管理制度”等，这里结合语境推测可能是“状态、机制、 regime”等不太好准确翻译的意思，整体译文可能需要结合更完整的文本进一步优化表述。）
Heat transport in the geostrophic regime of rotating Rayleigh-Bénard convection.
作者信息
Ecke Robert E, Niemela Joseph J
机构信息
Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
International Centre for Theoretical Physics, Strada Costiera 11, 34014 Trieste, Italy.
出版信息
Phys Rev Lett. 2014 Sep 12;113(11):114301. doi: 10.1103/PhysRevLett.113.114301. Epub 2014 Sep 8.
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.
我们报告了在长宽比为Γ = 1/2的圆柱形对流池中旋转瑞利 - 贝纳德对流中热传输的实验测量结果。流体为氦气，普朗特数Pr = 0.7。控制参数范围为瑞利数4×10⁹ < Ra < 4×10¹¹以及埃克曼数2×10⁻⁷ < Ek < 3×10⁻⁵（对应泰勒数4×10⁹ < Ta < 1×10¹⁴和对流罗斯比数0.07 < Ro < 5）。我们通过热传输努塞尔数Nu的实验测量确定了从弱旋转湍流对流到旋转主导的地转对流的转变。热传输使用参数RaEkβ（1.65 < β < 1.8）能得到最佳塌缩，在Ra/Rac与Ek的相图中定义了两个边界，并阐明了旋转热对流的地转湍流 regime的特性。我们通过直接测量发现Nu ∼ (Ra/Rac)γ，其中γ ≈ 1，从标度论证推断1.2 < γ < 1.6。
Zotero 插件