Explosive Eruptions of Volcanoes: Hydrodynamic Shock Tubes as Lab Method of Simulation
Obviously, it is beyond question that the explosive character of decompression during the volcanic eruption initiates a whole spectrum of phenomena in a precompressed magmatic melt containing large amounts of dissolved gases: homogeneous nucleation, bubbly cavitation, gas diffusion, and dynamically increasing viscosity of the melt. It is these processes that determine the eruption character, the magma state dynamics, and the flow structure in decompression waves as a whole. In the same time many aspects of their mechanisms remain unclear. The answers to these questions and, in particular, to the question about the mechanism of the cavitating magma transition to a state of an ash cloud cannot be simple because of extremely complicated and multiple-scale phenomena such as an explosive eruption . In this connection, as it was noted by Gilbert and Sparks , laboratory experiments on the dynamics researches of volcanic flows and, in particular, the shock tube methods must become important components of simulation processes together with mathematical models and numerical analysis.
KeywordsExplosive Eruption Underwater Explosion Cavitation Zone Explosive Volcanic Eruption Volcanic Conduit
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