Three-Dimensional Unsteady Turbulent Thermoviscous Multiphase Modelling of Volcanic Jets and Directed Blasts Including Radiation Effects

现有的火山喷发模型需要被一个更充分的模型所取代，因为许多对喷发柱、爆炸和相关现象的观测仍然缺乏理论解释。仔细的理论分析是必不可少的，它可以为检验实地观察提供解释，并为实地调查提供新的、有见地的方法。由于先进的数值技术和超级计算机的可用性，精确的建模现在是可行的。因此，我们建议为火山喷发建立一个严格的统一计算模型，包括：三维、非定常、湍流、可压缩、热粘性、多相辐射流，以及外来水、任意横风剖面、分层潮湿大气和真实地面地形的相互作用。通风口的方向和形状是任意的。该基金将部分支持一名研究生，该研究生将在两位pi的监督下参与该模型的开发。

Existing volcanic eruption models need to be superceded by a more adequate modelling, since many observations of eruption columns, blasts and related phenomena still lack theoretical explanation. Careful theoretical analyses are essential to provide explanations against which field observations may be tested, and to provide the stimulus for new, insightful approaches to field investigation. Accurate modelling is now feasible due to availability of advanced numerical techniques and supercomputers. We therefore propose to develop a rigorous unified computational model for volcanic eruptions involving: three-dimensional, unsteady, turbulent, compressible, thermoviscous, multiphase radiating flow, with interaction from extraneous water, arbitrary cross-wind profiles, stratified humid atmosphere, and realistic ground topography. Vent orientation and shape will be arbitrary. This grant will partially support a graduate student who will participate in the development of this model under the supervision of the two PIs.