International Research Fellow Awards: Understanding of the Behavior of Pyroclastic Flow Through Experiment and Model

小行星9704290 国际研究员奖励计划使美国科学家和工程师能够在国外进行三到二十四个月的研究。该计划的奖项提供了联合研究的机会，以及使用独特或互补的设施，专业知识和实验条件。 该奖项将支持詹姆斯W博士为期十二个月的博士后研究访问。瓦伦斯和斯图尔特B医生一起工作。 加拿大蒙特利尔麦吉尔大学的萨维奇。 瓦伦斯博士将研究火山碎屑流的行为，重点是模拟和建模。 火山碎屑流是热的、干燥的颗粒流和具有高浓度颗粒的气体流。该项目将涵盖流的所有部分，包括热的、非流化至部分流化的、致密的、基底雪崩，其颗粒浓度与原始存款的颗粒浓度相似，具有非常低的颗粒浓度的压倒性湍流灰云浪涌，以及对流灰云。 然而，这项研究的重点是颗粒基底雪崩。 这些流动破坏财产，每年造成数百人死亡。 该项目将联合收割机结合一位在火山灾害评估和力学方面经验丰富的实地地质学家和一位在麦吉尔大学在颗粒流动力学和建模方面享有国际声誉的土木工程教授的才能。 ***

9704290 Vallance The International Research Fellow Awards Program enables U.S. scientists and engineers to conduct three to twenty - four months of research abroad. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions. This award will support a twelve-month postdoctoral research visit by Dr. James W. Vallance to work with Dr. Stuart B. Savage at McGill University in Montreal, Canada. Dr. Vallance will be studying the behavior of pyroclastic flows focusing on simulation and modelling. Pyroclastic flows are hot, dry flows of particles and gas with a high concentration of particles. This project will encompass all parts of a flow, including a hot, non- to partly fluidized, dense, basal avalanche having a concentration of particles similar to that of the original deposit, an overriding turbulent ash cloud surge with a very low particle concentration, and a convecting ash cloud. The study focuses, however, on the granular basal avalanche. These flows destroy property and kill hundreds of people yearly. This project will combine the talents of a field oriented geologist, experienced in volcanic hazard assessment and mechanics, with a professor of civil engineering, internationally respected in grain-flow mechanics and modelling, at McGill. ***