All Outputs (7)

A novel experimental apparatus for investigating bubbly flows in a slot geometry (2020)
Journal Article
Capponi, A., Crosby, A. C., Lishman, S., & Llewellin, E. W. (2020). A novel experimental apparatus for investigating bubbly flows in a slot geometry. Review of Scientific Instruments, 91(4), Article 045110. https://doi.org/10.1063/1.5126775

Bubbly flows occur in a wide variety of industrial and environmental settings. While there is a broad literature that describes bubbly flow behavior in pipes and channels, flow in a high aspect ratio slot has received little attention. We describe th... Read More about A novel experimental apparatus for investigating bubbly flows in a slot geometry.

Experimental observations of bubbling regimes at in-line multi-orifice bubblers (2019)
Journal Article
Capponi, A., & Llewellin, E. W. (2019). Experimental observations of bubbling regimes at in-line multi-orifice bubblers. International Journal of Multiphase Flow, 114, 66-81. https://doi.org/10.1016/j.ijmultiphaseflow.2019.02.008

Bubble formation and bubbling regimes are well-characterized for the cases of single-orifice bubblers and industrial perforated plates. However, bubbling regimes from bubblers with multiple in-line orifices remain poorly described. Here, we investiga... Read More about Experimental observations of bubbling regimes at in-line multi-orifice bubblers.

The dynamics of slug trains in volcanic conduits: Evidence for expansion driven slug coalescence (2017)
Journal Article
Pering, T., McGonigle, A., James, M., Capponi, A., Lane, S., Tamburello, G., & Aiuppa, A. (2017). The dynamics of slug trains in volcanic conduits: Evidence for expansion driven slug coalescence. Journal of Volcanology and Geothermal Research, 348, 26-35. https://doi.org/10.1016/j.jvolgeores.2017.10.009

Strombolian volcanism is a ubiquitous form of activity, driven by the ascent and bursting of bubbles of slug morphology. Whilst considerable attention has been devoted to understanding the behaviour of individual slugs in this regime, relatively litt... Read More about The dynamics of slug trains in volcanic conduits: Evidence for expansion driven slug coalescence.

Recycled ejecta modulating Strombolian explosions (2016)
Journal Article
Capponi, A., Taddeucci, J., Scarlato, P., & Palladino, D. (2016). Recycled ejecta modulating Strombolian explosions. Bulletin of Volcanology, 78(2), Article 13. https://doi.org/10.1007/s00445-016-1001-z

Two main end-members of eruptive regimes are identified from analyses of high-speed videos collected at Stromboli volcano (Italy), based on vent conditions: one where the vent is completely clogged by debris, and a second where the vent is open, with... Read More about Recycled ejecta modulating Strombolian explosions.

Viscous plugging can enhance and modulate explosivity of strombolian eruptions (2015)
Journal Article
Del Bello, E., Lane, S., James, M., Llewellin, E., Taddeucci, J., Scarlato, P., & Capponi, A. (2015). Viscous plugging can enhance and modulate explosivity of strombolian eruptions. Earth and Planetary Science Letters, 423, 210-218. https://doi.org/10.1016/j.epsl.2015.04.034

Strombolian activity is common in low-viscosity volcanism. It is characterised by quasi-periodic, short-lived explosions, which, whilst typically weak, may vary greatly in magnitude. The current paradigm for a strombolian volcanic eruption postulates... Read More about Viscous plugging can enhance and modulate explosivity of strombolian eruptions.

Physical parameterization of Strombolian eruptions via experimentally-validated modeling of high-speed observations (2012)
Journal Article
Taddeucci, J., Alatorre-Ibargüengoitia, M., Moroni, M., Tornetta, L., Capponi, A., Scarlato, P., …De Rita, D. (2012). Physical parameterization of Strombolian eruptions via experimentally-validated modeling of high-speed observations. Geophysical Research Letters, 39(16), Article L16306. https://doi.org/10.1029/2012gl052772

[1] Pressurized gas drives explosive volcanic eruptions. Existing models can predict the amount and pressure of gas in erupting magma, but application and testing of such models is currently limited by the accuracy of input parameters from natural sy... Read More about Physical parameterization of Strombolian eruptions via experimentally-validated modeling of high-speed observations.

High-speed imaging of Strombolian explosions: The ejection velocity of pyroclasts (2012)
Journal Article
Taddeucci, J., Scarlato, P., Capponi, A., Del Bello, E., Cimarelli, C., Palladino, D., & Kueppers, U. (2012). High-speed imaging of Strombolian explosions: The ejection velocity of pyroclasts. Geophysical Research Letters, 39(2), Article L02301. https://doi.org/10.1029/2011gl050404

[1] Explosive volcanic eruptions are defined as the violent ejection of gas and hot fragments from a vent in the Earth's crust. Knowledge of ejection velocity is crucial for understanding and modeling relevant physical processes of an eruption, and y... Read More about High-speed imaging of Strombolian explosions: The ejection velocity of pyroclasts.