Analytical solutions and virtual origin corrections for forced, pure and lazy turbulent plumes based on a universal entrainment function

F Ciriello, GR Hunt - Journal of Fluid Mechanics, 2020 - cambridge.org
Previous measurements and numerical simulations of buoyant turbulent plumes that
develop from area sources provide convincing evidence that entrainment varies locally in …

Experimental investigation into turbulent negatively buoyant jets using combined PIV and PLIF measurements

L Milton-McGurk, N Williamson, SW Armfield… - International Journal of …, 2020 - Elsevier
Turbulent negatively buoyant jets occur when the buoyancy of a jet opposes its source
momentum. In these flows, the fluid will rise until it reaches a stagnation point and a return …

Probabilistic volcanic hazard assessment for pyroclastic density currents from pumice cone eruptions at Aluto volcano, Ethiopia

B Clarke, P Tierz, E Calder, G Yirgu - Frontiers in Earth Science, 2020 - frontiersin.org
Aluto volcano, in the Main Ethiopian Rift, is a peralkaline caldera system, which comprises
conglomerations of rhyolite (obsidian) lavas and enigmatic pumice cones. Recent work at …

Wind entrainment in jets with reversing buoyancy: Implications for volcanic plumes

A Michaud‐Dubuy, G Carazzo… - Journal of Geophysical …, 2020 - Wiley Online Library
Explosive volcanic eruptions commonly undergo a transition from stable plume to collapsing
fountain with associated destructive pyroclastic density currents. A major goal in physical …

A comparison of entrainment in turbulent line plumes adjacent to and distant from a vertical wall

DA Parker, HC Burridge, JL Partridge… - Journal of Fluid …, 2020 - cambridge.org
We present simultaneous two-dimensional measurements of the velocity and buoyancy
fields on a central vertical plane in two-dimensional line plumes: a free plume distant from …

Numerical investigation of starting turbulent buoyant plumes released in neutral atmosphere

K Bhaganagar, SR Bhimireddy - Journal of Fluid Mechanics, 2020 - cambridge.org
A fundamental study has been conducted to understand the mean and turbulence
characteristics and their role in mixing processes of starting turbulent plumes initiated by a …

Volcaniclastic dispersal during submarine lava effusion: the 2012 eruption of Havre Volcano, Kermadec Arc, New Zealand

AP Murch, JDL White, T Barreyre, RJ Carey… - Frontiers in Earth …, 2020 - frontiersin.org
Understanding clast dispersal from subaqueous volcanism is hampered by uncertainty in
the source and extent of seafloor deposits. Extensive sampling in situ of seafloor deposits …

Revisiting mean flow and mixing properties of negatively round buoyant jets using the escaping mass approach (EMA)

AA Bloutsos, PC Yannopoulos - Fluids, 2020 - mdpi.com
The flow formed by the discharge of inclined turbulent negatively round buoyant jets is
common in environmental flow phenomena, especially in the case of brine disposal. The …

The use of a numerical weather prediction model to simulate near-field volcanic plumes

RR Burton, MJ Woodhouse, AM Gadian, SD Mobbs - Atmosphere, 2020 - mdpi.com
In this paper, a state-of the art numerical weather prediction (NWP) model is used to
simulate the near-field plume of a Plinian-type volcanic eruption. The NWP model is run at …

Control of vent geometry on the fluid dynamics of volcanic plumes: Insights from numerical simulations

YJ Suzuki, A Costa, T Koyaguchi - Geophysical Research …, 2020 - Wiley Online Library
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 …