Olivier Roche

Centre National de la Recherche Scientifique — France

Environmental Science · Physical Sciences

37h-index4.7kcitations206works0.82yr avg
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Research Topics

Landslides and related hazards(80), Granular flow and fluidized beds(62), earthquake and tectonic studies(46), Geological formations and processes(28), Geological and Geochemical Analysis(26)

Publications205 total

Pour prédire si un volcan sera effusif ou explosif, il faut s’intéresser à ses bulles
2025Open Access
Shear-induced bubble nucleation in magmas
Science·2025· 1 citedOpen Access
Spontaneous Unsteadiness and Sorting in Pyroclastic Density Currents and Their Deposits
Geophysical monograph·2025· 1 citedOpen Access
CHAPTER 4.4 Pyroclastic Density Currents
2025Open Access
Emplacement mechanisms of pyroclastic density currents: insights from numerical simulation of dense granular flow with pore gas pressure
SPIRE - Sciences Po Institutional REpository·2025Open Access
A fluidised and stable non-isochoric model applied to the numerical simulation of the collapse of dense granular columns
SPIRE - Sciences Po Institutional REpository·2025
Unifying fluidization and defluidization of granular columns
Physical review. E·2025Open Access
Probabilistic tephra fallout hazard maps for Sangay volcano, Ecuador
Bulletin of Volcanology·2025· 3 citedOpen Access
Dry granular collapse into a liquid: Role of viscous dissipation on granular flow regimes and associated waves
Physical Review Fluids·2024· 2 citedOpen Access
Run-out distance of initially fluidized, collapsing granular columns with different aspect ratios: constraints and volcanological implications from experiments and 2D incompressible simulations
Bulletin of Volcanology·2024Open Access
Probabilistic, scenario-based hazard assessment for pyroclastic density currents at Tungurahua volcano, Ecuador
Bulletin of Volcanology·2024· 1 citedOpen Access
Probabilistic tephra fallout hazard maps for Sangay volcano, Ecuador
2024Open Access
Different physics but similar dependence of runout distance with discharge rate: the duality of pyroclastic density currents
Bulletin of Volcanology·2024· 2 citedOpen Access
Effect of fluidization in increasing the run-out distance of granular flows generated from different aspect ratio collapsing columns
Research Square (Research Square)·2024Open Access
Probabilistic hazard assessment for pyroclastic density currents at Tungurahua volcano, Ecuador
2024Open Access
Tsunamis generated by pyroclastic flows: experimental insights into the effect of the bulk flow density
Bulletin of Volcanology·2024· 4 citedOpen Access
Multilayer HySEA granular flow and tsunami model improves results over single layer models: sensitivity analysis, benchmarking against flume experiments, and implications for field scale models.
2024Open Access
Experimental Study of the Generation of Pore Gas Pressure in Pyroclastic Density Currents Resulting From Eruptive Fountain Collapse
Journal of Geophysical Research Solid Earth·2023· 2 citedOpen Access
Spontaneous Unsteadiness and Sorting in Pyroclastic Density Currents and their Deposits
2023· 3 citedOpen Access
Spontaneous Unsteadiness and Sorting in Pyroclastic Density Currents and their Deposits - Data
Zenodo (CERN European Organization for Nuclear Research)·2023Open Access
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Frequent Co-authors

A. Mangeney(9), T. H. Druitt(7), Aldo Tamburrino(5), Pablo Samaniego(5), Yarko Niño(4), Mark A Gilbertson(4), Jeremy C. Phillips(4), R. S. J. Sparks(4), Jochen Zuegge(3), Gisbert Schneider(3), S. A. Fagents(3), Benjamín van Wyk de Vries(3), Santiago Montserrat(3), Karim Kelfoun(3), Patricio Valderrama(3), Antoine Łucas(2), Wolfgang Guba(2), Alexander Alanine(2), Mark Rogers‐Evans(2), Renaud Delannay(2)