2020
DOI: 10.1029/2020gl087038
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Control of Vent Geometry on the Fluid Dynamics of Volcanic Plumes: Insights From Numerical Simulations

Abstract: We present three-dimensional numerical simulations of eruption clouds from circular to linear fissure vents to investigate the control of vent shape on the height and stability of volcanic plumes during large explosive eruptions. Our results show that clouds ejected from circular or low-aspect-ratio (nearly square-like) fissure vents can be associated with radially suspended flow (RSF) at the top of the jet region, whereas those emitted from narrow-fissure vents are not. Non-RSF plumes are more stable than tho… Show more

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Cited by 6 publications
(2 citation statements)
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“…Changes in eruption characteristics may be influenced by observable topographic changes of active vents (shape, size, depth, open/closed, rim height) [e.g. Capponi et al 2016;Cole et al 2015;Jessop et al 2016;Solovitz et al 2014;Suzuki et al 2020].…”
Section: Introductionmentioning
confidence: 99%
“…Changes in eruption characteristics may be influenced by observable topographic changes of active vents (shape, size, depth, open/closed, rim height) [e.g. Capponi et al 2016;Cole et al 2015;Jessop et al 2016;Solovitz et al 2014;Suzuki et al 2020].…”
Section: Introductionmentioning
confidence: 99%
“…It is readily apparent from Figure 2a that lightning activity varied differently within and outside a range of 20–30 km from this point. Such a region in a volcanic cloud above the crater exhibits specific dynamics and can be referred to as the vent region (Costa et al., 2018; Suzuki et al., 2020). In this study, 20 km was taken as the radius of the vent region.…”
Section: Resultsmentioning
confidence: 99%