Atmospheric Fluid Dynamics

巴斯教授、舒伯特教授和科奇博士将对自下而上加热的流动中的非线性热对流进行理论研究。其目的是阐明湍流对流的基本机制，并解释在地球和行星大气中观察到的对流特征。该项目包含四个要素。1.计算与时间相关的三维节点对流，重点分析其与观测到的轮辐型对流的关系。我们将研究一些与时间相关的节状对流的特征，如平均流。2.具有非对称边界条件的对流在本质上是典型的，但在理论上很少受到关注。三维对流形式，如六角形或正方形格子的对流，预计将占主导地位。3.将具有对称切变的平均流如平面Couette流的三维对流的计算推广到Poiseuille流的情况。4.用高分辨率数值程序研究快速旋转球壳内的对流。结果将根据在圆柱环模型中发现的分叉解的特征来解释。

Professors F. H. Busse and G. Schubert and Dr. R. Clever will conduct theoretical research on nonlinear thermal convection in flows heated from below. The goal is to elucidate the basic mechanisms in turbulent convection and to interpret the convective features observed in the earth and planetary atmospheres. The project contains four elements. 1. Three-dimensional time-dependent knot convection will be computed with emphasis on its relationship to the observed spoke pattern convection. Features such as mean flow associated, with some kinds of time-dependent knot convection, will be studied. 2. Convection with asymmetric boundary conditions is typical in nature, but has received little theoretical attention. Three- dimensional forms of convection such as those with an hexagonal or square lattice are expected to prevail. 3. Computations of three-dimensional convection flows in the presence of a mean flow with symmetric shear such as plane Couette flow will be extended to the case of Poiseuille flow. 4. Convection in rapidly rotating spherical shells will be studied with high resolution numerical codes. Results will be interpreted in terms of features of bifurcating solutions found in the cylindrical annulus model.//