论文标题
摩擦边界层对旋转湍流对流中涡流凝结的影响
Frictional boundary layer effect on vortex condensation in rotating turbulent convection
论文作者
论文摘要
我们对低（$ pr = 0.1 $）的流体和高（$ pr = 5 $）的旋转雷利 - 贝纳德对流进行直接数值模拟，并在水平周期性层中具有无滑顶和底部边界的prandtl数字。在两个prandtl数字上，我们都证明了动能的高档转移，从而导致域填充涡流结构的发展。尽管从粘性边界层泵送出所谓的Ekman促进了羽状垂直干扰，但足够强的浮力强迫和旋转促进了流动的准二维湍流状态。
We perform direct numerical simulations of rotating Rayleigh--Bénard convection of fluids with low ($Pr=0.1$) and high ($Pr=5$) Prandtl numbers in a horizontally periodic layer with no-slip top and bottom boundaries. At both Prandtl numbers, we demonstrate the presence of an upscale transfer of kinetic energy that leads to the development of domain-filling vortical structures. Sufficiently strong buoyant forcing and rotation foster the quasi-two-dimensional turbulent state of the flow, despite the formation of plume-like vertical disturbances promoted by so-called Ekman pumping from the viscous boundary layer.
