Advances in studies of dense volcanic granular flows
Por:
Bursik M., Patra A., Pitman E.B., Nichita C., Macias J.L., Saucedo R., Girina O.
Publicada:
1 ene 2005
Resumen:
The collapse and decrepitation of a lava dome at the summit of a volcano generally results in the generation of dense granular flows, often referred to as block and ash flows. As the dome particles propagate from the source, they break apart by internal pressure as well as collision. The propagation of block and ash flows can be simulated to some accuracy with a depth averaged numerical model of the equations of continuity and momentum for a material with a frictional resistance. However, important features of such flows, such as the influence of remote stress through force chains, erosion of the volcano substrate, and shock formation and pressurization upon particle break up are poorly understood. In the near future, the influence of these factors will be incorporated into depth averaged models. Various numerical techniques based on particles will some day yield results that can be compared not only with bulk flow properties, but to the internal layering of block and ash flow deposits. © 2005 IOP Publishing Ltd.
Filiaciones:
Bursik M.:
University of Buffalo, SUNY, Buffalo, NY 14260, United States
Patra A.:
University of Buffalo, SUNY, Buffalo, NY 14260, United States
Pitman E.B.:
University of Buffalo, SUNY, Buffalo, NY 14260, United States
Nichita C.:
University of Buffalo, SUNY, Buffalo, NY 14260, United States
Macias J.L.:
Universidad National Autonoma de Mexico, Coyoacan, Mexico D F, Mexico
Saucedo R.:
Universidad National Autonoma de Mexico, Coyoacan, Mexico D F, Mexico
Girina O.:
Institute of Volcanic Geology and Geochemistry, Russian Academy of Sciences, Petropavlovsk-Kamchatskii, Russian Federation
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