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http://hdl.handle.net/2122/14646
Authors: | Farina, Angiolo* Matrone, Jacopo* Montagna, Chiara Paola* Rosso, Fabio* |
Title: | Modeling of a gas slug rising in a cylindrical duct and possible applications to volcanic scenarios | Journal: | Rendiconti Lincei - Matematica e Applicazioni | Series/Report no.: | 4/31 (2020) | Publisher: | EMS Publishing House | Issue Date: | 2020 | DOI: | 10.4171/RLM/920 | 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. |
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