Interdisciplinary Summer School: Granular Flows-From Simulations to Astrophysical Applications; University of Maryland, College Park; June 13-17, 2011

一个跨学科的暑期学校将于2011年6月13日至17日在马里兰大学帕克分校举行，题为“颗粒流——从模拟到天体物理应用”。其目的是将颗粒物理学和天体物理学的专家和学生聚集在一起，专注于在物理学和天体物理学中出现的颗粒流的最先进的实验和模拟方法。从小行星到行星岩石雪崩，颗粒流在广泛的天体物理应用中都遇到过。由于最近和计划中的机器人对各种小行星、彗星和其他行星体的任务，我们对这些流的了解正在爆炸。这批数据正在分析中，颗粒排列的模式和颗粒材料的样本正在返回进行分析。与此同时，在过去二十年中，在阐明颗粒流动的物理特性方面取得了重大进展，从对干扰过渡的描述，到对偏析和三维流动的分析。对于颗粒流的基本物理，这些新的观测提供了一个前所未有的机会，可以应用过去几十年在颗粒流方面获得的知识，并将模型的测试扩展到变化重力的制度，特别是小行星的非常低的重力。学校将包括动手组件，学生将学习如何模拟颗粒流以及如何批判性地评估流模拟的结果。科里啊?Hern（耶鲁大学）和Derek Richardson（马里兰大学）将在下午为学生们讲授直接数值模拟的实践训练课程。此外，密集颗粒流实验研究专家将对学生进行颗粒流场和力的实验测量训练。

An Interdisciplinary Summer School will take place at the University of Maryland College Park June 13-17 2011 entitled "Granular Flows - From Simulations to Astrophysical Applications". The aim is to bring together experts and students from both granular physics and astrophysics and focus on state-of-the-art experimental and simulation approaches for granular flows that are emerging in both physics and astrophysics. Granular flows are encountered in a wide range of astrophysical applications from asteroids to planetary rock avalanches. Our knowledge about these flows is exploding due to recent and planned robotic missions to various asteroids, comets, and other planetary bodies. The trove of data is being analyzed now, with patterns of granular arrangements and samples of granular materials returning for analysis. At the same time, significant progress has been made over the last two decades to elucidate the physics of granular flows, from the description of the jamming transition, to analysis of segregation and 3-D flows. For basic physics of granular flows, these new observations offer an unprecedented opportunity to apply the knowledge gained in the last decades on granular flows, and to expand the test of models into a regime of varying gravity, in particular the very low gravity of asteroids. The school will include hands-on components where students will learn how to simulate granular flows and how to evaluate results from flow simulations critically. Corey O?Hern (Yale University) and Derek Richardson (UMD) will lead hands-on afternoon training sessions for students on direct numerical simulations. In addition, experts in experimental studies of dense granular flows will train students in experimental measurements of granular flow fields and forces.