Molecular-Dynamics Simulation of Vulcanian Eruption

Details Molecular-Dynamics Simulation of Vulcanian Eruption Molecular-Dynamics Simulation of Vulcanian Eruption

2005-10-16

arxiv.org/abs/physics/0510147v1

Physics

Geophysics

4 pages, 4 figures

Scientific paper

Vulcanian explosive eruption, which is a nonlinear and nonequilibrium abrupt dynamics of magma-gas mixture, is modeled by a two-component Lennard-Jones particle system. Molecular-dynamics simulation of a shock-tube experiment gives consistent results with a explosive eruption picture of volcanology; Shock wave and expansion wave are reproduced. In addition bubble nucleation of a gas component in the magma melt and spinodal-like decomposition are observed in the simulation. The result is also compared with a continuum hydrodynamic model; Qualitative features of continuum dynamics are reproduced by the present model. We find that the particle description of dynamics is an effective method in such kind of abrupt dynamics.

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