Multiphysics Modeling and Terascale Simulations of Volcanic Blasts Over Complex Terrains

这个项目将专注于对一种罕见但灾难性的火山喷发进行建模，这种火山喷发发生在穹顶坍塌时，导致强大的爆炸，将气体、岩浆和岩石抛出整个景观。这项工作的学术价值在于对火山爆发的物理和流体动力学的基本理解。这项工作将有助于更好地估计灾难性火山喷发对人和财产造成的损害的程度和严重程度。工作的目标是建立一个全面的数学模型，描述从坍塌的火山侧翼流动到三维地形上的湍流可压缩气体-颗粒混合物的随时间变化的运动，并数值实现所产生的全套方程。一旦这个模型被开发出来，研究人员将对逐渐复杂的地形进行大量模拟。最终，他们计划评估开发的通用模型反映记录或推断的1980年圣海伦斯火山喷发过程的准确性。

This project will focus on modeling of a rare, but catastrophic, style of volcanic eruption that occurs when a dome collapses, resulting in a powerful blast that hurls gases, magma and rocks across the landscape. The intellectual merit of the work is in the fundamental understanding of the physics and fluid dynamics of explosive volcanic eruptions. The work will help in better estimating the extent and severity of damage that the catastrophic volcanic eruptions pose to people and property.The objectives of the work are to formulate a comprehensive mathematical model that describes the time-dependent movement of a turbulent compressible gas-particle mixture flowing from a collapsed volcanic flank onto a three-dimensional terrain and to numerically implement the resulting full set of equation. Once this model is developed, the researchers will perform a number of simulations for progressively more complex terrains. Ultimately, they plan to evaluate the accuracy with which the generalized model developed reflects processes documented or inferred for the Mount St. Helens eruption of 1980.