Workshop on Environmental and Extreme Multiphase Flows, Gainesville, FL, March 14 - 16, 2012

1217409 PI：巴拉昌达火山喷发、粉雪雪崩、浑浊洋流、沙尘暴和气泡羽流是环境流动的各种例子。但它们有很多共同的物理特征。从根本上说，所有这些流动都是分散的两相湍流的环境例子。例如，在浊流和粉雪雪崩中，关键的共同物理学是准确地捕捉沉积和从底部边界再悬浮之间的竞争。同样，环境流体的夹带是在火山和气泡羽流的垂直发展中发挥关键作用的过程。尽管有这些共性，但数学模型、闭包和模拟技术的进步是独立进行的。特别是，最近研究企业的快速扩张极大地削弱了思想交流的潜力。研讨会的目的是将这些不同学科的世界级专家聚集在一起，促进思想和方法的交流。研讨会于2012年3月14日至3月16日在佛罗里达州盖恩斯维尔的佛罗里达大学举行。研讨会的学术价值在于确定共同的关键突出挑战，从而使人们能够更好地理解、建模和预测一大类复杂的环境湍流多相流问题。讲习班的更广泛影响将是通过一个专门的网站广泛传播讲习班的成果和结论，并将主要贡献作为最新书籍出版。

1217409 PI: BalachandarVolcanic eruptions, powder snow avalanches, turbidity currents, dust storms and bubble plumes are diverse examples of environmental flows. But they share a lot of common physics. Fundamentally all these flows are environmental examples of dispersed two-phase turbulence. For example, both in turbidity currents and powder snow avalanches the key common physics is in accurately capturing the competition between deposition and resuspension from the bottom boundary. Similarly, entrainment of ambient fluid is the process that plays a key role in the vertical development of volcanic and bubbly plumes. Despite these commonalities, the progress of mathematical models, closures and simulation techniques have gone on independently. Especially, the recent rapid expansion of research enterprise has greatly diminished the potential for cross fertilization of ideas. The purpose of the workshop is to bring world-class experts from these different disciplines and promote cross fertilization of ideas and methodologies. The workshop is held at the University of Florida, Gainesville, FL, from March 14th to March 16th of 2012.The intellectual merit of the workshop is to identify key outstanding challenges that are common and thereby enable better understanding, modeling and predictive simulations of a broad class of complex environmental turbulent multiphase flow problems. The broader impact of the workshop will be through wide dissemination of the workshop results and findings through a dedicated website and also by publishing the key contributions as a state of the art book.