Numerical Simulation of Volcanic Jets

Abstract : We numerically model the dynamics of explosive volcanic eruptions to study the fluid-dynamic structure of jets that develop in such processes. The eruptive mixture is described as a two-phase flow made of gas and solid particles. The hyperbolic portion of these equations consists of the compressible Euler equations for the gas phase and the non-strictly hyperbolic conservation laws for a pressureless dust, used to model the solid phase. These equations are coupled together through terms modeling inter-phase drag and heat transfer. Gravity is also taken into account for both phases. Ejection velocities in eruptions are often large enough that the jet is supersonic relative to the mixture sound speed, leading to the development of internal shock wave structures. We solve the system of equations by employing a high-resolution finite volume method based on wave propagation algorithms.
Type de document :
Communication dans un congrès
F. Asakura, H. Aiso, S. Kawashima, A. Matsumura, S. Nishibata and K. Nishihara. Tenth International Conference on Hyperbolic Problems (HYP2004), Sep 2004, Osaka, Japan. Yokohama Publishers, Hyperbolics problems - Theory, numerics and applications II, 〈http://www.math.sci.osaka-u.ac.jp/~hyp2004/〉
Liste complète des métadonnées

Littérature citée [19 références]  Voir  Masquer  Télécharger

https://hal-ensta.archives-ouvertes.fr/hal-01342312
Contributeur : Marica Pelanti <>
Soumis le : mardi 5 juillet 2016 - 16:47:25
Dernière modification le : lundi 6 novembre 2017 - 11:12:10

Fichier

pelanti_hyp04_volcan.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : hal-01342312, version 1

Collections

Citation

Marica Pelanti, Randall Leveque. Numerical Simulation of Volcanic Jets. F. Asakura, H. Aiso, S. Kawashima, A. Matsumura, S. Nishibata and K. Nishihara. Tenth International Conference on Hyperbolic Problems (HYP2004), Sep 2004, Osaka, Japan. Yokohama Publishers, Hyperbolics problems - Theory, numerics and applications II, 〈http://www.math.sci.osaka-u.ac.jp/~hyp2004/〉. 〈hal-01342312〉

Partager

Métriques

Consultations de la notice

70

Téléchargements de fichiers

30