Multiphysics Modeling and Terascale Simulations of Volcanic Blasts Over Complex Terrains

该项目将专注于模拟一种罕见但灾难性的火山爆发，这种火山爆发发生在圆顶倒塌时，导致强大的爆炸，将气体，岩浆和岩石投掷到整个景观中。 这项工作的智力价值在于对爆炸性火山爆发的物理学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爆发对人民和财产造成的损害的范围和严重程度，其目标是制定一个全面的数学模型，描述湍流可压缩气体颗粒混合物从坍塌的火山侧面流向三维地形的随时间变化的运动，并以数字方式执行由此产生的整套方程。 一旦这个模型被开发出来，研究人员将对越来越复杂的地形进行一些模拟。 最终，他们计划评估所开发的广义模型反映1980年圣海伦斯火山爆发记录或推断的过程的准确性。

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.