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Experimental model of the role of cracks in the mechanism of explosive eruption of St. Helens-80


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Abstract

A unique mini model of explosive volcano eruption through a formed system of cracks is developed. The process of crack formation and development is simulated by electric explosion of a conductor in a plate of optically transparent organic glass submerged into water. The explosion of a wire aligned with a through hole in the plate generates shock-wave loading along the plate and forms cracks. The fundamental role of high velocity flow in crack wedging by a high power hydrodynamic flow of a pulsating explosion cavity has been demonstrated.

About the authors

V. K. Kedrinskii

Lavrentev Institute of Hydrodynamics, Siberian Branch

Author for correspondence.
Email: kedr@hydro.nsc.ru
Russian Federation, Novosibirsk, 630090

A. A. Skulkin

Lavrentev Institute of Hydrodynamics, Siberian Branch

Email: kedr@hydro.nsc.ru
Russian Federation, Novosibirsk, 630090

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