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dc.contributor.authorSuckale, Jenny
dc.contributor.authorHager, Bradford H.
dc.contributor.authorElkins-Tanton, Linda T.
dc.contributor.authorNave, Jean-Christophe
dc.date.accessioned2011-04-28T15:42:29Z
dc.date.available2011-04-28T15:42:29Z
dc.date.issued2010-07
dc.date.submitted2010-02
dc.identifier.issn0148–0227
dc.identifier.urihttp://hdl.handle.net/1721.1/62545
dc.description.abstractThis is the second paper of two that examine numerical simulations of buoyancy-driven flow in the presence of large viscosity contrasts. In the first paper, we demonstrated that a combination of three numerical tools, an extended ghost fluid type method, the level set approach, and the extension velocity technique, accurately simulates complex interface dynamics in the presence of large viscosity contrasts. In this paper, we use this threefold numerical method to investigate bubble dynamics in the conduits of basaltic volcanos with a focus on normal Strombolian eruptions. Strombolian type activity, named after the famously episodic eruptions at Stromboli volcano, is characterized by temporally discrete fountains of incandescent clasts. The mildly explosive nature of normal Strombolian activity, as compared to more effusive variants of basaltic volcanism, is related to the presence of dissolved gas in the magma, yielding a complex two-phase flow problem. We present a detailed scaling analysis allowing identification of the pertinent regime for a given flow problem. The dynamic interactions between gas and magma can be classified into three nondimensional regimes on the basis of bubble sizes and magma viscosity. Resolving the fluid dynamics at the scale of individual bubbles is not equally important in all three regimes: As long as bubbles remain small enough to be spherical, their dynamic interactions are limited compared to the rich spectrum of coalescence and breakup processes observed for deformable bubbles, in particular, once inertia ceases to be negligible. One key finding in our simulations is that both large gas bubbles and large conduit-filling gas pockets (“slugs”) are prone to dynamic instabilities that lead to their rapid breakup during buoyancy-driven ascent. We provide upper bound estimates for the maximum stable bubble size in a given magmatic system and discuss the ramifications of our results for two commonly used models of normal Strombolian type activity, the rise-speed-dependent model and the collapsing foam model.en_US
dc.description.sponsorshipUnited States. Dept. of Energy (contract DE‐AC02‐05CH11231)en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (Continental Dynamics EAR‐0409373)en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (Astronomy CAREER award)en_US
dc.description.sponsorshipNational Science Foundation (U.S.) (grant DMS‐0813648)en_US
dc.language.isoen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.isversionofhttp:/dx.doi.org/10.1029/2009JB006917en_US
dc.rightsCreative Commons Attribution-Noncommercial-Share Alike 3.0en_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/en_US
dc.sourceProf. Hager via Michael Nogaen_US
dc.titleIt takes three to tango: 2. Bubble dynamics in basaltic volcanoes and ramifications for modeling normal Strombolian activityen_US
dc.typeArticleen_US
dc.identifier.citationSuckale, J., B. H. Hager, L. T. Elkins-Tanton, and J.-C. Nave (2010), It takes three to tango: 2. Bubble dynamics in basaltic volcanoes and ramifications for modeling normal Strombolian activity, J. Geophys. Res., 115, B07410.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciencesen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Mathematicsen_US
dc.contributor.approverHager, Bradford H.
dc.contributor.mitauthorHager, Bradford H.
dc.contributor.mitauthorSuckale, Jenny
dc.contributor.mitauthorElkins-Tanton, Linda T.
dc.contributor.mitauthorNave, Jean-Christophe
dc.relation.journalJournal of Geophysical Researchen_US
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsSuckale, Jenny; Hager, Bradford H.; Elkins-Tanton, Linda T.; Nave, Jean-Christopheen
dc.identifier.orcidhttps://orcid.org/0000-0003-4008-1098
mit.licenseOPEN_ACCESS_POLICYen_US


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