Supercomputer modeling of volcanic eruption dynamics

Abstract

Summary of ObjectivesThe purpose of this research is to adapt LANL simulation codes to include new geometries and equations-of-state in order to constrain processes that occur during volcanic eruptions. In particular we intend to examine the influence of multiphase flow on fluid dynamic behavior, including local temperature, composition, dynamic pressure, and density and to utilize this information for the interpretation of volcanic features and processes on Earth, Io, Triton, Venus, and Mars. The work has been pursued at LANL by Valentine, K. Wohletz, T. McGetchin, and others for over a decade and has reached the point where Kieffer's research on volcanic equations-of-state and planetary geology can be confidently included. M. Morrissey applied the LANL code DASH to investigate the relation between fluid flow in a crack and volcanic long-period seismic signals, and is continuing this work with Bernard Chouet at the USGS in Menlo Park. A new direction of study which has occurred in the past few months is simulation of ejecta emplacement from large meteorite impacts and comparison with volcanic processes gleaned from our modeling studies.