Atmospheric Fluid Dynamics

本文研究的对象是非线性热对流 从下面层层加热。 研究的目标是 层流和紊流对流基本机理的阐明 以及它们在解释海洋中观察到的特征方面的用途 地球和其他行星的大气层。 特别是： 1. 为了分析时间周期的非线性特性， 对流及其稳定性特征。 此前一度 研究集中在行波对流， 现在将集中注意力在更复杂的情况下， 振荡滴状对流 2. 对流与平均剪切流的相互作用将是 延伸到水平层绕着 垂直轴。 3. 对流的三维状态从 倾斜层中横向辊的不稳定性将 研究了 4. 稳定的双峰对流单体及其不稳定性将是 在非对称边界条件下进行分析。 5. 旋转球形流体对流换热的数值研究 壳将被扩展到更高的泰勒和瑞利 号码

The objective of this research is nonlinear thermal convection in layers heated from below. The goal of the research is the elucidation of basic mechanisms in laminar and turbulent convection and their use for the interpretation of observed features in the atmospheres of the Earth and other planets. In particular: 1. To analyze the nonlinear properties of time-periodic convection and its stability characteristics. After earlier research has focussed on traveling wave convection, the attention will be focussed now on the more complex case of oscillatory blob convection. 2. The interaction of convection with a mean shear flow will be extended to the case of a horizontal layer rotating about a vertical axis. 3. Three-dimensional states of convection evolving from the instability of transverse rolls in an inclined layer will be investigated. 4. Steady bimodal convection cells and their instability will be analyzed in the case of asymmetric boundary conditions. 5. The numerical study of convection in rotating spherical fluid shells will be extended to higher Taylor- and Rayleigh numbers.