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Journal of Applied Mechanics and Technical Physics

2017 year, number 6

Initial Stage of Modeling of the Magma State in a Slot Volcano with a Finite Velocity of Diaphragm Opening

M. N. Davydov, V. K. Kedrinskii
Lavrent'ev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
Keywords: щелевое вулканическое извержение, трещина, магматический расплав, декомпрессия, кавитация, вязкость, slot volcano eruption, crack, magma melt, decompression, cavitation, viscosity


Results of a numerical analysis of the dynamic behavior of a compressed magma melt in a slot channel with gradual opening of the diaphragm and results of simulations of its time evolution are reported. The Iordanskii-Kogarko-van Vijngaarden mathematical model of a two-phase medium and a model that describes phase changes in the gas-saturated plasma behind the front of the decompression wave being formed are used. Results of numerical simulations of the flow with allowance for specific features of the pressure dynamics in the decompression wave, mass velocity components, volume fraction of the gas phase, and its viscosity are presented.