Numerical modelling of the growth dynamics of a simple silicic lava dome

Details Numerical modelling of the growth dynamics of a simple silicic lava dome Numerical modelling of the growth dynamics of a simple silicic lava dome

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30rsd11h&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 19, pp. SDE 11-1, CiteID 2003, DOI 10.1029/2003GL018182

Physics

Geophysics

Mathematical Geophysics: Modeling, Volcanology: Eruption Monitoring (7280), Volcanology: Lava Rheology And Morphology

Scientific paper

Two-dimensional axisymmetrical computational models have been developed using finite element techniques to represent the rheological stiffening due to degassing-induced crystallisation and the effects of a brittle carapace within a simple lava dome. The dome is modelled numerically considering the effects of temperature, pressure and rate of extrusion. Using these state variables the bulk viscosity is derived from empirical equations and the bulk rheology approximated using a solidification viscosity, dividing the dome into solid-dominated and fluid-dominated domains. Elastoplastic equations for the solid component and fluid-mechanical equations for the fluid domain are solved simultaneously allowing continuous stress across the fluid-solid interface to ensure the two components move in unison. We apply this model, a Hookean solid carapace model and a purely fluid lava dome model to the case of the October 1980 lava dome at Mount St. Helens. The results show that dynamic growth models involving a solid carapace are required to simulate this lava dome.

Affiliated with

Also associated with

No associations

Rating

Numerical modelling of the growth dynamics of a simple silicic lava dome does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Numerical modelling of the growth dynamics of a simple silicic lava dome, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Numerical modelling of the growth dynamics of a simple silicic lava dome will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-918413