Numerical modeling of fluid flow with rafts: An application to lava flows / Tsepelev Igor,Ismail-Zadeh Alik,Melnik Oleg,Korotkii Alexander // JOURNAL OF GEODYNAMICS. - 2016. - V. 97, l. . - P. 31-41.

ISSN/EISSN:

0264-3707 / нет данных

Type:

Article

Abstract:

Although volcanic lava flows do not significantly affect the life of people, its hazard is not negligible as hot lava kills vegetation, destroys infrastructure, and may trigger a flood due to melting of snow/ice. The lava flow hazard can be reduced if the flow patterns are known, and the complexity of the flow with debris is analyzed to assist in disaster risk mitigation. In this paper we develop three-dimensional numerical models of a gravitational flow of multi-phase fluid with rafts (mimicking rigid lava-crust fragments) on a horizontal and topographic surfaces to explore the dynamics and the interaction of lava flows. We have obtained various flow patterns and spatial distribution of rafts depending on conditions at the surface of fluid spreading, obstacles on the way of a fluid flow, raft landing scenarios, and the size of rafts. Furthermore, we analyze two numerical models related to specific lava flows: (i) a model of fluid flow with rafts inside an inclined channel, and (ii) a model of fluid flow from a single vent on an artificial topography, when the fluid density, its viscosity, and the effusion rate vary with time. Although the studied models do not account for lava solidification, crust formation, and its rupture, the results of the modeling may be used for understanding of flows with breccias before a significant lava cooling. (C) 2016 Elsevier Ltd. All rights reserved.

Author keywords:

Numerical modeling; Multi-phase fluid flow; Lava; Breccia; Debris EFFUSION RATE; MOUNT-ETNA; EVOLUTION; DYNAMICS; SIMULATIONS; SURFACE; BASIN

DOI:

10.1016/j.jog.2016.02.010

Web of Science ID:

ISI:000377313100004

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	JUL
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language	English
Keywords-Plus	EFFUSION RATE; MOUNT-ETNA; EVOLUTION; DYNAMICS; SIMULATIONS; SURFACE; BASIN
Research-Areas	Geochemistry \& Geophysics
Web-of-Science-Categories	Geochemistry \& Geophysics
Author-Email	Alik.Ismail-Zadeh@kit.edu
ResearcherID-Numbers	Ismail-Zadeh, Alik/C-3693-2013 Melnik, Oleg/E-4224-2010
ORCID-Numbers	Melnik, Oleg/0000-0002-4655-5269
Funding-Acknowledgement	Russian Science Foundation {[}14-17-00520]
Funding-Text	We thank P. Connolly, J. Eichelberger, and S. Fedotov for discussions. This work is supported by the Russian Science Foundation (grant 14-17-00520).
Number-of-Cited-References	32
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	13
Journal-ISO	J. Geodyn.
Doc-Delivery-Number	DN8EX