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Experimental Measurement of Enhanced and Hindered Particle Settling in Turbulent Gas‐Particle Suspensions, and Geophysical Implications
Baptiste Penlou
,
Olivier Roche
,
Michael Manga
,
Siet van den Wildenberg
Journal articles
hal-04012883v1
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High CO2 content in magmas of the explosive andesitic Enco eruption of Mocho-Choshuenco volcano (Chile)
Jean-Guillaume Feignon
,
Nicolas Cluzel
,
Federica Schiavi
,
Séverine Moune
,
Olivier Roche
et al.
Journal articles
insu-03643025v1
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Long-runout pyroclastic density currents: Analysis and implications
Olivier Roche
,
Christopher Henry
,
Nourddine Azzaoui
,
Arnaud Guillin
Journal articles
hal-03792847v1
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PyroCLAST: a new experimental framework to investigate overspilling of channelized, concentrated pyroclastic currents
V. Gueugneau
,
S. Charbonnier
,
Olivier Roche
Journal articles
hal-03924443v1
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Influence of the topography of stratovolcanoes on the propagation and channelization of dense pyroclastic density currents analyzed through numerical simulations
Alvaro Aravena
,
Olivier Roche
Journal articles
insu-03708896v1
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Tephra Fallout Probabilistic Hazard Maps for Cotopaxi and Guagua Pichincha Volcanoes (Ecuador) With Uncertainty Quantification
Alessandro Tadini
,
N. Azzaoui
,
Olivier Roche
,
P. Samaniego
,
B. Bernard
et al.
Journal articles
hal-03603654v1
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Granular mixture deflation and generation of pore fluid pressure at the impact zone of a pyroclastic fountain: Experimental insights
Allan Fries
,
Olivier Roche
,
Guillaume Carazzo
Journal articles
hal-03254051v1
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Influence of bottom roughness and ambient pressure conditions on the emplacement of experimental dam-break granular flows
Santiago Montserrat
,
Lady Ordoñez
,
Aldo Tamburrino
,
Olivier Roche
Journal articles
hal-03254037v1
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Experimental assessment of the effective friction at the base of granular chute flows on a smooth incline
Olivier Roche
,
Siet van den Wildenberg
,
Alexandre Valance
,
Renaud Delannay
,
A. Mangeney
et al.
Journal articles
hal-03249403v1
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Pressure-dependent threshold in a granular flow: Numerical modeling and experimental validation
L. Chupin
,
T. Dubois
,
M. Phan
,
Olivier Roche
Journal articles
hal-03254021v1
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Laboratory Landquakes: Insights From Experiments Into the High‐Frequency Seismic Signal Generated by Geophysical Granular Flows
M. Arran
,
A. Mangeney
,
J. de Rosny
,
M. Farin
,
R. Toussaint
et al.
Journal articles
hal-03253991v1
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The influence of gas pore pressure in dense granular flows: numerical simulations versus experiments and implications for pyroclastic density currents
Alvaro Aravena
,
Laurent Chupin
,
Thierry Dubois
,
Olivier Roche
Journal articles
hal-03408294v1
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Pressure-dependent threshold in a granular flow: numerical modelling and experimental validation
Laurent Chupin
,
Thierry Dubois
,
Minh Phan
,
Olivier Roche
Journal articles
hal-02562000v2
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The Tutupaca volcanic complex (Southern Peru): Eruptive chronology and successive destabilization of a dacitic dome complex
J. Mariño
,
Pablo Samaniego
,
N. Manrique
,
P. Valderrama
,
Olivier Roche
et al.
Journal articles
hal-03254008v1
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Experimental Insights on the Propagation of Fine‐Grained Geophysical Flows Entering Water
Alexis Bougouin
,
Olivier Roche
,
Raphael Paris
,
Herbert E Huppert
Journal articles
hal-03192290v1
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Discharge rate of explosive volcanic eruption controls runout distance of pyroclastic density currents
Olivier Roche
,
Nourddine Azzaoui
,
Arnaud Guillin
Journal articles
hal-03254073v1
|
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Quantifying the Uncertainty of a Coupled Plume and Tephra Dispersal Model: PLUME‐MOM/HYSPLIT Simulations Applied to Andean Volcanoes
M. Alessandro Tadini
,
Olivier Roche
,
P. Samaniego
,
A. Guillin
,
N. Azzaoui
et al.
Journal articles
hal-02453781v1
|
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Impact of Fluidized Granular Flows into Water: Implications for Tsunamis Generated by Pyroclastic Flows
Alexis Bougouin
,
Raphael Paris
,
Olivier Roche
Journal articles
hal-02794348v1
|
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Acoustic probing of the particle concentration in turbulent granular suspensions in air
S. van den Wildenberg
,
X. Jia
,
Olivier Roche
Journal articles
hal-02962260v1
|
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A laboratory-scale study on the role of mechanical vibrations in pore pressure generation in pyroclastic materials: implications for pyroclastic flows
Carlos Soria-Hoyo
,
José Manuel Valverde
,
Olivier Roche
Journal articles
hal-02615201v1
|
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Continuum modelling of pressure‐balanced and fluidized granular flows in 2D: comparison with glass bead experiments and implications for concentrated pyroclastic currents
E.C.P. Breard
,
J. Dufek
,
Olivier Roche
Journal articles
hal-02277041v1
|
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The contribution of experimental volcanology to the study of the physics of eruptive processes, and related scaling issues: A review
Olivier Roche
,
Guillaume Carazzo
Journal articles
hal-02277033v1
|
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Maximum Solid Phase Concentration in Geophysical Turbulent Gas‐Particle Flows: Insights From Laboratory Experiments
A. Weit
,
Olivier Roche
,
T. Dubois
,
M. Manga
Journal articles
hal-02277038v1
|
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Experimental Measurement of the Solid Particle Concentration in Geophysical Turbulent Gas-Particle Mixtures
A. Weit
,
Olivier Roche
,
Thierry Dubois
,
M. Manga
Journal articles
hal-01914237v1
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Granular fingering as a mechanism for ridge formation in debris avalanche deposits: Laboratory experiments and implications for Tutupaca volcano, Peru
P. Valderrama
,
Olivier Roche
,
P. Samaniego
,
Benjamin van Wyk de Vries
,
G. Araujo
et al.
Journal articles
hal-01677525v1
|
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Autofluidization of collapsing bed of fine particles: Implications for the emplacement of pyroclastic flows
Corentin Chédeville
,
Olivier Roche
Journal articles
hal-01927748v1
|
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Effects of pore pressure in pyroclastic flows : numerical simulation and experimental validation
V. Gueugneau
,
K. Kelfoun
,
Olivier Roche
,
L. Chupin
Journal articles
hal-01625001v1
|
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Two-dimensional simulation by regularization of free surface viscoplastic flows with Drucker-Prager yield stress and application to granular collapse
Christelle Lusso
,
Alexandre Ern
,
François Bouchut
,
Anne Mangeney
,
Maxime Farin
et al.
Journal articles
hal-01133786v2
|
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Granular and particle-laden flows: from laboratory experiments to field observations
Renaud Delannay
,
Alexandre Valance
,
Anne Mangeney
,
Olivier Roche
,
Patrick Richard
et al.
Journal articles
hal-01481019v1
|
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Eruptive parameters and dynamics of the April 2015 sub-Plinian eruptions of Calbuco volcano (southern Chile)
Angelo Castruccio
,
Jorge Clavero
,
Andrea Segura
,
Pablo Samaniego
,
Olivier Roche
et al.
Journal articles
hal-01637081v1
|
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Enhanced run-out of dam-break granular flows caused by initial fluidization and initial material expansion
S. Montserrat
,
A. Tamburrino
,
Olivier Roche
,
Y. Niño
,
C. F. Ihle
et al.
Journal articles
hal-01637427v1
|
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The controls and consequences of substrate entrainment by pyroclastic density currents at Mount St Helens, Washington (USA)
N.M. Pollock
,
B.D. Brand
,
Olivier Roche
Journal articles
hal-01637535v1
|
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Dynamic implications of ridges on a debris avalanche deposit at Tutupaca volcano (southern Peru)
Patricio Valderrama
,
Olivier Roche
,
Pablo Samaniego
,
Benjamin van Wyk de Vries
,
Karine Bernard
et al.
Journal articles
hal-01638575v1
|
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Highly explosive eruption of the monogenetic 8.6ka BP La Vache et Lassolas scoria cone complex (Chaîne des Puys, France)
Simone Jordan
,
Jean-Luc Le Pennec
,
Lucia Gurioli
,
Olivier Roche
,
Pierre Boivin
et al.
Journal articles
hal-01637384v1
|
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Slow-moving and far-travelled dense pyroclastic flows during the Peach Spring super-eruption
Olivier Roche
,
D. C. C Buesch
,
G. A. A Valentine
Journal articles
hal-01637183v1
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Are eruptions from linear fissures and caldera ring dykes more likely to produce pyroclastic flows?
D.E. Jessop
,
J. Gilchrist
,
A.M. Jellinek
,
Olivier Roche
Journal articles
hal-01637379v1
|
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Nature and velocity of pyroclastic density currents inferred from models of entrainment of substrate lithic clasts
Olivier Roche
Journal articles
hal-01134741v1
|
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MeMoVolc consensual document: a review of cross-disciplinary approaches to characterizing small explosive magmatic eruptions
Lucia Gurioli
,
D. Andronico
,
Patrick Bachèlery
,
Hélène Balcone-Boissard
,
Jean Battaglia
et al.
Journal articles
hal-01170133v1
|
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Evolution of Irruputuncu volcano, Central Andes, northern Chile
I. Rodríguez
,
Olivier Roche
,
Séverine Moune
,
F. Aguilera
,
E. Campos
et al.
Journal articles
hal-01914263v1
|
|
The historical (218 ± 14 aBP) explosive eruption of Tutupaca volcano (Southern Peru)
Pablo Samaniego
,
Patricio Valderrama
,
Jersy Mariño
,
Benjamin van Wyk de Vries
,
Olivier Roche
et al.
Journal articles
hal-01172542v1
|
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Influence of slope angle on pore pressure generation and kinematics of pyroclastic flows: insights from laboratory experiments
Corentin Chedeville
,
Olivier Roche
Journal articles
hal-01914260v1
|
|
Towards a quantitative understanding of pyroclastic flows: Effects of expansion on the dynamics of laboratory fluidized granular flows
L. Girolami
,
Timothy H. Druitt
,
Olivier Roche
Journal articles
hal-01172391v1
|
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Viscoplastic modeling of granular column collapse with pressure-dependent rheology
Ioan Ionescu
,
Anne Mangeney
,
François Bouchut
,
Olivier Roche
Journal articles
hal-01080456v1
|
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Dome collapse mechanisms and block-and-ash flow emplacement dynamics inferred from deposit and impact mark analysis, Mono Craters, CA
R.L. Dennen
,
M. I. Bursik
,
Olivier Roche
Journal articles
hal-01134228v1
|
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Autofluidization of pyroclastic flows propagating on rough substrates as shown by laboratory experiments
Corentin Chedeville
,
Olivier Roche
Journal articles
hal-01133677v1
|
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Fundamental changes of granular flow dynamics, deposition, and erosion processes at high slope angles: Insights from laboratory experiments
Maxime Farin
,
Anne Mangeney
,
Olivier Roche
Journal articles
hal-01133676v1
|
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Experimental study of dense pyroclastic density currents using sustained, gas-fluidized granular flows
Pete J. Rowley
,
Olivier Roche
,
Timothy H. Druitt
,
Ray Cas
Journal articles
hal-01133621v1
|
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Dynamic pore-pressure variations induce substrate erosion by pyroclastic flows
Olivier Roche
,
Yarko Niño
,
Anne Mangeney
,
Brittany Brand
,
Nicholas Pollock
et al.
Journal articles
hal-00866159v1
|
|
Depositional processes and gas pore pressure in pyroclastic flows: an experimental perspective
Olivier Roche
Journal articles
hal-00793602v1
|
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Dynamics of dense granular flows of small-and-large-grain mixtures in an ambient fluid
C. Meruane
,
A. Tamburrino
,
Olivier Roche
Journal articles
hal-00784192v1
|
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Pore fluid pressure diffusion in defluidizing granular columns
Santiago Montserrat
,
Aldo Tamburrino
,
Olivier Roche
,
Yarko Niño
Journal articles
hal-00720261v1
|
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LiDAR derived morphology of the 1993 Lascar pyroclastic flow deposits, and implication for flow dynamics and rheology
D.E. Jessop
,
Karim Kelfoun
,
Philippe Labazuy
,
Anne Mangeney
,
Olivier Roche
et al.
Journal articles
hal-00787536v1
|
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On the run-out distance of geophysical gravitational flows: Insight from fluidized granular collapse experiments
Olivier Roche
,
M. Attali
,
Anne Mangeney
,
A. Lucas
Journal articles
hal-00682312v1
|
|
Erosion and mobility in granular collapse over sloping beds
A. Mangeney
,
Olivier Roche
,
O. Hungr
,
N. Mangold
,
Gloria Faccanoni
et al.
Journal articles
hal-00521671v1
|
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Pore fluid pressure and internal kinematics of gravitional laboratory air-particle flows: Insights into the emplacement dynamics of pyroclastic flows
Olivier Roche
,
S. Montserrat
,
Y. Niño
,
A. Tamburrino
Journal articles
hal-00521673v1
|
|
Particle velocity fields and depositional processes in laboratory ash flows, with implications for the sedimentation of dense pyroclastic flows
Laurence Girolami
,
Olivier Roche
,
Timothy H. Druitt
,
Thomas Corpetti
Journal articles
hal-00522979v1
|
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Velocity fields and depositional processes in laboratory ash flows, with implications for the dynamics of dense pyroclastic flows
L Girolami
,
Olivier Roche
,
T. Druitt
,
T Corpetti
Bulletin of Volcanology, 2010
Journal articles
hal-02169477v1
|
|
On the role of the ambient fluid on gravitational granular flow dynamics
C. Meruane
,
A. Tamburrino
,
Olivier Roche
Journal articles
hal-00521666v1
|
|
Propagation and hindered settling of laboratory ash flows
L Girolami
,
T. Druitt
,
Olivier Roche
,
Z. Khrabrykh
Journal articles
hal-02169463v1
|
|
Experimental observations of water-like behavior of initially fluidized, dam break granular flows and their relevance for the propagation of ash-rich pyroclastic flows
Olivier Roche
,
Santiago Montserrat
,
Yarko Niño
,
Aldo Tamburrino
Journal articles
hal-00381402v1
|
|
The influence of particle size on the flow of initially fluidized powders.
Olivier Roche
,
M.A. Gilbertson
,
J.C. Phillips
,
R.S.J. Sparks
Journal articles
hal-00272268v1
|
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Inviscid behaviour of fines-rich pyroclastic flows inferred from experiments on gas–particle mixtures
Olivier Roche
,
R Gilbertson
,
J Phillips
,
R Sparks
Journal articles
hal-01914230v1
|
|
Experimental study of gas-fluidized granular flows with implications for pyroclastic flow emplacement
Olivier Roche
,
M. Gilbertson
,
J. Phillips
,
R. Sparks
Journal articles
hal-01914219v1
|
|
Experiments on deaerating granular flows and implications for pyroclastic flow mobility
Olivier Roche
,
M Gilbertson
,
J C Phillips
,
R S J Sparks
Journal articles
hal-03031507v1
|
|
Experimental aqueous fluidization of ignimbrite
Olivier Roche
,
Timothy H. Druitt
,
R a F Cas
Journal of Volcanology and Geothermal Research, 2001, 112 (1-4), pp.267-280
Journal articles
hal-03031481v1
|
|
Onset of caldera collapse during ignimbrite eruptions
Olivier Roche
,
Timothy Druitt
Earth and Planetary Science Letters, 2001, 191 (3-4), pp.191-202
Journal articles
hal-03031494v1
|
|
Sub-surface structures and collapse mechanisms of summit pit craters
Olivier Roche
,
B van Wyk de Vries
,
Timothy H. Druitt
Journal of Volcanology and Geothermal Research, 2001, 105 (1-2), pp.1-18
Journal articles
hal-03031476v1
|
|
Experimental study of caldera formation
Olivier Roche
,
Timothy H. Druitt
,
Olivier Merle
Journal of Geophysical Research, 2000, 105 (B1), pp.395-416
Journal articles
hal-03031456v1
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