Granular Geophysical Fluid Dynamics

9706220罗斯曼 PI提出了工作的粒状流体，其中包括特定的地球物理流动的数值模型的发展，除了工作的基本理论适用于广泛的现象。 特别重点将集中在颗粒表面的侵蚀，并将集中在山坡地形的演变和渠道网络的启动。 重点将放在研究现场数据和模型中明显的统计相关性，以及随后使用它们来约束问题的连续体配方。 该建议的第二个重点是研究模式的形成动摇的沙子，理解从波浪状图案的过渡到本地化的激发，后者迄今为止只出现在粒状系统的目标。 一些工作将集中在湿颗粒沉积研究模型的开发上。 ***

9706220 Rothman The PI proposes work on granular fluids that includes the development of numerical models of particular geophysical flows in addition to work on a basic theory applicable to a wide range of phenomena. Special emphasis will be focused on the erosion of granular surfaces and will concentrate on the evolution of hillslope topography and the initiation of channel networks. The focus will be on the study of statistical correlations evident in both field data and models, and their subsequent use to constrain continuum formulations of the problem. The second emphasis of the proposal is to study pattern formation in shaken sand, with the goal of understanding the transition from wavelike patterns to localized excitations, the latter of which have thus far appeared only in granular systems. Some work will concentrate on the development of models for the study of wet granular deposition. ***