Coupling rheology and segregation in granular flows

T Barker, M Rauter, ESF Maguire… - Journal of Fluid …, 2021 - cambridge.org
During the last fifteen years there has been a paradigm shift in the continuum modelling of
granular materials; most notably with the development of rheological models, such as the …

Self-channelisation and levee formation in monodisperse granular flows

FM Rocha, CG Johnson, J Gray - Journal of Fluid Mechanics, 2019 - cambridge.org
Dense granular flows can spontaneously self-channelise by forming a pair of parallel-sided
static levees on either side of a central flowing channel. This process prevents lateral …

Phenomenology of avalanche recordings from distributed acoustic sensing

P Paitz, N Lindner, P Edme, P Huguenin… - Journal of …, 2023 - Wiley Online Library
Avalanches and other hazardous mass movements pose a danger to the population and
critical infrastructure in alpine areas. Hence, understanding and continuously monitoring …

Granular stresses in granular flows subjected to different obstacles

YC Chung - International Journal of Mechanical Sciences, 2023 - Elsevier
Although the application and development of continuum approaches demonstrate immense
promise to model granular flows, the assumption of isotropic stress state in a constitutive law …

Deposit‐derived block‐and‐ash flows: the hazard posed by perched temporary tephra accumulations on volcanoes; 2018 Fuego Disaster, Guatemala

G Risica, M Rosi, M Pistolesi… - Journal of …, 2022 - Wiley Online Library
The impact of hazardous pyroclastic density currents (PDCs) increases with runout distance,
which is strongly influenced by the mass flux. This article shows that the mass flux of a PDC …

[HTML][HTML] Different erosion and entrainment mechanisms in snow avalanches

X Li, B Sovilla, C Ligneau, C Jiang, J Gaume - Mechanics Research …, 2022 - Elsevier
Erosion significantly affects the dynamics of gravity-driven mass flows. In snow avalanches,
the snow cover can be substantially eroded but only partially entrained, however, there are …

μ (j)-rheology-based depth-averaged dynamic model for roll waves in granular–fluid avalanches

J Fei, H Shi, Y Jie, B Zhang - Applied Mathematical Modelling, 2023 - Elsevier
A depth-averaged two-dimensional mathematical model of granular-fluid avalanches is
proposed based on the μ (J) rheology. In the model, a depth-averaged deviatoric viscous …

Evaluation of laboratory methods to quantify particle size segregation using image analysis in landslide flume tests

JM Kimball, ET Bowman, J Gray, WA Take - Landslides, 2024 - Springer
Landslides comprised of a wide range of particle sizes (eg debris flows) exhibit flow
structures arising from particle size segregation. Segregation influences the mobility of the …

A perspective of surge dynamics in natural debris flows through pulse‐Doppler radar observations

T Schöffl, G Nagl, R Koschuch… - Journal of …, 2023 - Wiley Online Library
As a consequence of their natural occurrence and the frequent formation of multiple surges
with high sediment loads, debris flows are considered one of the most hazardous gravity …

Analyzing bulk flow characteristics of debris flows using their high frequency seismic signature

Z Zhang, F Walter, BW McArdell… - Journal of …, 2021 - Wiley Online Library
Quantifying debris‐flow characteristics remains a key challenge in natural hazard research.
Recent studies suggest that seismic signals can reveal debris‐flow properties. However, the …