Numerical investigation of penetrative convection in atmosphere and ocean

将研究对流对稳定分层区域的渗透，并研究其对混合和重力波产生的影响。该项目将使用密度分层不可压缩流动的数值模拟作为研究工具。对流将由适当选择的简单人工强迫产生，这种强迫可以在强度和空间尺度上变化。模拟将考虑穿透对流如何导致对流区带源的示踪剂混合到稳定区，以及穿透产生的重力波的特性。考虑了对流羽流中垂直速度的变化、稳定分层区的分层和垂直切变的影响。所探讨的参数制度将受到大气和海洋中具体例子的激励，但总体重点将放在管理这些类型的流动在许多不同应用中的一般流体动力学原理上。

The penetration of convection into stably stratified regions, will be studied examining the implications for mixing and for generation of gravity waves. The project will use numerical simulation of density-stratified incompressible flow as a research tool. The convection will be generated by a suitably chosen simple artificial forcing which can be varied in strength and spatial scale. The simulations will consider the how the penetrative convection leads to mixing of tracers with sources in the convecting region into the stable region and the characteristics of gravity waves that are generated by the penetration. The effects of varying the vertical velocity in the convective plumes, the stratification in the stably stratified region and the vertical shear will all be considered. The parameter regimes explored will be motivated by specific examples in atmosphere and ocean, but the overall emphasis will be on general fluid dynamical principles that govern these types of flows across many different applications.