An Experimental Study of Two-Layer Convection

PI将进行一系列实验室实验， 两个不同流体层的热对流 密度和粘度。 的密度和粘度 工作流体将通过改变浓度来控制 分别为盐和纤维素（Natrosol）的水溶液。 这项技术最重要的优点是， 和粘度可以独立变化，这是不可能的， 在以前的实验研究中。 的首要目标 实验是（1）确定热的条件下， 并且层之间发生机械耦合，并且（2） 导出量的比例定律（例如，努塞尔数与混合 速率），其描述系统的全局演化。

The PI will carry out a series of laboratory experiments on thermal convection in two superposed fluid layers with different densities and viscosities. The density and viscosity of the working fluid will be controlled by varying the concentrations respectively of salt and cellulose (Natrosol) in aqueous solution. The most important advantage of this technique is that the density and viscosity can be varied independently, which was not possible in previous experimental studies. The primary goals of the experiments are (1) to determine the conditions under which thermal and mechanical coupling between the layers occurs,a nd (2) to derive scaling laws for quantities (e.g., Nusselt number and mixing rate) which describes the global evolution of the system.