JournalsrlmVol. 31, No. 4pp. 917–937

Modeling of a gas slug rising in a cylindrical duct and possible applications to volcanic scenarios

  • Angiolo Farina

    Università degli Studi di Firenze, Italy
  • Jacopo Matrone

    Università degli Studi di Firenze, Italy
  • Chiara P. Montagna

    Istituto Nazionale di Geofisica e Vulcanologia, Pisa, Italy
  • Fabio Rosso

    Università degli Studi di Firenze, Italy
Modeling of a gas slug rising in a cylindrical duct and possible applications to volcanic scenarios cover
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Abstract

The paper deals with the mathematical modelling of a gas slug rising in a cylindrical duct filled with an incompressible liquid. This research is motivated by a phenomenon commonly observed during Strombolian eruptions at basaltic volcanoes, that is, mildly explosive events driven by a large bubble of magmatic gas (a slug) rising up the conduit and bursting at the surface. The model is compared with the laboratory experiments described in [15] and we prove that the constancy of the slug ascent velocity observed in these experiments is fully justifiable. The model is developed both in the case of a Newtonian fluid and in the case of a non-Newtonian power law fluid, more suitable for magmas, and applied to a volcanic scenario.

Cite this article

Angiolo Farina, Jacopo Matrone, Chiara P. Montagna, Fabio Rosso, Modeling of a gas slug rising in a cylindrical duct and possible applications to volcanic scenarios. Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. 31 (2020), no. 4, pp. 917–937

DOI 10.4171/RLM/920