A Numerical Model For The Dynamics Of Pyroclastic Flows At Galeras Volcano, Colombia

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Journal Article: A Numerical Model For The Dynamics Of Pyroclastic Flows At Galeras Volcano, Colombia

Abstract
This paper presents a two-dimensional model for dilute pyroclastic flow dynamics that uses the compressible Navier-Stokes equation coupled with the Diffusion-Convection equation to take into account sedimentation. The model is applied to one of the slopes of Galeras Volcano to show: (1) the temperature evolution with the time; (2) dynamic pressure change; and (3) particle concentration along the computer domain from the eruption to the impact with a topographic barrier located more than 16 km from the source. Two initial solid volumetric fractions are modeled. For both cases, some of the structures located more distant than 10 km could survive, but in all cases the flow remains deadly. This paper shows that a dynamical model of pyroclastic flows can be implemented using personal computers.

Author 
G. Cordoba








Published Journal 
Journal of Volcanology and Geothermal Research, 2005





DOI 
Not Provided
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Citation

G. Cordoba. 2005. A Numerical Model For The Dynamics Of Pyroclastic Flows At Galeras Volcano, Colombia. Journal of Volcanology and Geothermal Research. (!) .