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Particle-water heat transfer during explosive volcanic eruptions

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Particle-water heat transfer during explosive volcanic eruptions. / Woodcock, D. C.; Gilbert, Jennie; Lane, S. J.
In: Journal of Geophysical Research: Solid Earth, Vol. 117, No. B10, B10205, 11.10.2012.

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Woodcock DC, Gilbert J, Lane SJ. Particle-water heat transfer during explosive volcanic eruptions. Journal of Geophysical Research: Solid Earth. 2012 Oct 11;117(B10):B10205. doi: 10.1029/2012JB009240

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Woodcock, D. C. ; Gilbert, Jennie ; Lane, S. J. / Particle-water heat transfer during explosive volcanic eruptions. In: Journal of Geophysical Research: Solid Earth. 2012 ; Vol. 117, No. B10.

Bibtex

@article{a647236cfd774c0d9cfac47f34e223f7,
title = "Particle-water heat transfer during explosive volcanic eruptions",
abstract = "Thermal interaction between volcanic particles and water during explosive eruptions has been quantified using a numerical heat transfer model for spherical particles. The model couples intraparticle conduction with heat transfer from the particle surface by boiling water in order to explore heat loss with time for a range of particle diameters. The results are combined with estimates of particle settling times to provide insight into heat removal during eruption from samples of volcanic particles produced by explosive eruption. Heat removal is restricted by resistance to heat transfer from the volcanic particles with intraparticle thermal conduction important for large particles and surface cooling by boiling dominating for small particles. In most cases, volcanic particles approach thermal equilibrium with the surrounding fluid during an explosive eruption. Application of the results to a sample from the Gjalp 1996, Iceland eruption indicates that, relative to 0 degrees C, 70-80% of the heat is transferred from the particles to boiling water during the settling time before burial in the stratigraphic succession. The implication is that, for subglacial explosive eruptions, much of the heat content of the magma is coupled into melting ice extremely rapidly. If all particles of the Gjalp 1996 deposit were cooled to the local boiling point by the end of the eruption then approximately 78% of the initial heat content was removed from the erupting magma during the eruption. This is consistent with calorimetric calculations based on volumes of ice melted during and after the eruption.",
keywords = "boiling water, heat transfer, numerical model, volcanic particle",
author = "Woodcock, {D. C.} and Jennie Gilbert and Lane, {S. J.}",
note = "{\textcopyright}2012. American Geophysical Union. All Rights Reserved",
year = "2012",
month = oct,
day = "11",
doi = "10.1029/2012JB009240",
language = "English",
volume = "117",
journal = "Journal of Geophysical Research: Solid Earth",
publisher = "Wiley-Blackwell",
number = "B10",

}

RIS

TY - JOUR

T1 - Particle-water heat transfer during explosive volcanic eruptions

AU - Woodcock, D. C.

AU - Gilbert, Jennie

AU - Lane, S. J.

N1 - ©2012. American Geophysical Union. All Rights Reserved

PY - 2012/10/11

Y1 - 2012/10/11

N2 - Thermal interaction between volcanic particles and water during explosive eruptions has been quantified using a numerical heat transfer model for spherical particles. The model couples intraparticle conduction with heat transfer from the particle surface by boiling water in order to explore heat loss with time for a range of particle diameters. The results are combined with estimates of particle settling times to provide insight into heat removal during eruption from samples of volcanic particles produced by explosive eruption. Heat removal is restricted by resistance to heat transfer from the volcanic particles with intraparticle thermal conduction important for large particles and surface cooling by boiling dominating for small particles. In most cases, volcanic particles approach thermal equilibrium with the surrounding fluid during an explosive eruption. Application of the results to a sample from the Gjalp 1996, Iceland eruption indicates that, relative to 0 degrees C, 70-80% of the heat is transferred from the particles to boiling water during the settling time before burial in the stratigraphic succession. The implication is that, for subglacial explosive eruptions, much of the heat content of the magma is coupled into melting ice extremely rapidly. If all particles of the Gjalp 1996 deposit were cooled to the local boiling point by the end of the eruption then approximately 78% of the initial heat content was removed from the erupting magma during the eruption. This is consistent with calorimetric calculations based on volumes of ice melted during and after the eruption.

AB - Thermal interaction between volcanic particles and water during explosive eruptions has been quantified using a numerical heat transfer model for spherical particles. The model couples intraparticle conduction with heat transfer from the particle surface by boiling water in order to explore heat loss with time for a range of particle diameters. The results are combined with estimates of particle settling times to provide insight into heat removal during eruption from samples of volcanic particles produced by explosive eruption. Heat removal is restricted by resistance to heat transfer from the volcanic particles with intraparticle thermal conduction important for large particles and surface cooling by boiling dominating for small particles. In most cases, volcanic particles approach thermal equilibrium with the surrounding fluid during an explosive eruption. Application of the results to a sample from the Gjalp 1996, Iceland eruption indicates that, relative to 0 degrees C, 70-80% of the heat is transferred from the particles to boiling water during the settling time before burial in the stratigraphic succession. The implication is that, for subglacial explosive eruptions, much of the heat content of the magma is coupled into melting ice extremely rapidly. If all particles of the Gjalp 1996 deposit were cooled to the local boiling point by the end of the eruption then approximately 78% of the initial heat content was removed from the erupting magma during the eruption. This is consistent with calorimetric calculations based on volumes of ice melted during and after the eruption.

KW - boiling water

KW - heat transfer

KW - numerical model

KW - volcanic particle

UR - http://www.scopus.com/inward/record.url?scp=84867648150&partnerID=8YFLogxK

U2 - 10.1029/2012JB009240

DO - 10.1029/2012JB009240

M3 - Journal article

VL - 117

JO - Journal of Geophysical Research: Solid Earth

JF - Journal of Geophysical Research: Solid Earth

IS - B10

M1 - B10205

ER -