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COMPONENTS AND PHASES: MODELLING PROGRESSIVE HYDROTHERMAL ERUPTIONS

Part of: Geophysics Geophysics (general)

Published online by Cambridge University Press:  03 November 2009

ROBERT MCKIBBIN ,
THOMASIN A. SMITH  and
LUKE FULLARD
ROBERT MCKIBBIN*
Affiliation:
Institute of Information and Mathematical Sciences, Massey University, New Zealand (email: r.mckibbin@massey.ac.nz)
THOMASIN A. SMITH
Affiliation:
Institute of Fundamental Sciences, Massey University, New Zealand (email: t.a.smith@massey.ac.nz)
LUKE FULLARD
Affiliation:
Institute of Fundamental Sciences, Massey University, New Zealand (email: l.fullard@massey.ac.nz)
*
✉For correspondence; e-mail: r.mckibbin@massey.ac.nz
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Abstract

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This is a review of progress made since [R. McKibbin, “An attempt at modelling hydrothermal eruptions”, Proc. 11th New Zealand Geothermal Workshop 1989 (University of Auckland, 1989), 267–273] began development of a mathematical model for progressive hydrothermal eruptions (as distinct from “blasts”). Early work concentrated on modelling the underground process, while lately some attempts have been made to model the eruption jet and the flight and deposit of ejected material. Conceptually, the model is that of a boiling and expanding two-phase fluid rising through porous rock near the ground surface, with a vertical high-speed jet, dominated volumetrically by the gas phase, ejecting rock particles that are then deposited on the ground near the eruption site. Field observations of eruptions in progress and experimental results from a laboratory-sized model have confirmed the conceptual model. The quantitative models for all parts of the process are based on the fundamental conservation equations of motion and thermodynamics, using a continuum approximation for each of the components.

Keywords

hydrothermal eruptionsboiling in porous mediaeruption column

MSC classification

Secondary: 86A99: Miscellaneous topics 86A15: Seismology
Type
Research Article
Information
The ANZIAM Journal , Volume 50 , Issue 3: This Special Issue is dedicated to Dr Stephen White , January 2009 , pp. 365 - 380
Copyright
Copyright © Australian Mathematical Society 2009

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