Stick–slip motion and high speed ejecta in granular avalanches detected through a multi-sensors flume

Bartali, Roberto; Sarocchi, Damiano; Nahmad-Molinari, Yuri

doi:10.1016/j.enggeo.2015.06.019

Cited by 20 publications

(5 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All experiments were carried out using GRANFLOW-SIM (Fig. 1), a modular experimental flume designed and developed at the LAIMA (Image Analysis and Analogue Modelling Laboratory, for its Spanish acronym) at the Geology Institute of the Universidad Autónoma de San Luis Potosí, Mexico (Bartali et al, 2012(Bartali et al, , 2015. It consists of three main modules: i) a charge box, ii) a flume, and iii) an expansion box (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…The use of these facilities represents a unique opportunity for observing and measuring processes that can be scaled to real events (Iverson et al, 1992, Dellino et al, 2007, 2010a, 2010bSulpizio et al, 2009;Bartali et al, 2012Bartali et al, , 2015Dioguardi et al, 2013). Another advantage of laboratory experiments is the ability to control boundary conditions that can influence flow variables.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of particle density on flow behavior and deposit architecture of concentrated pyroclastic density currents over a break in slope: Insights from laboratory experiments

Rodríguez-Sedano

Sarocchi

Sulpizio

et al. 2016

Journal of Volcanology and Geothermal Research

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of particle density on flow behavior and deposit architecture of concentrated pyroclastic density currents over a break in slope: Insights from laboratory experiments

Rodríguez-Sedano

Sarocchi

Sulpizio

et al. 2016

Journal of Volcanology and Geothermal Research

View full text Add to dashboard Cite

“…That is why we proposed that the additional mechanism related to basal stress fluctuation should contribute to a further reduction in μ CM as D decreases (Li et al, 2022). ground, which is a typical runout path for rock avalanches (Crosta et al, 2017;Cruden & Hungr, 1986;Shi et al, 2023;Strom & Abdrakhmatov, 2018;Wang et al, 2018Wang et al, , 2019, and (b) this bilinear model with slope-break is a simplified model commonly used in theoretical analysis (Davies et al, 1999;Legros, 2002), numerical simulations (Johnson et al, 2016;Preuth et al, 2010) and physical model experiments (Bartali et al, 2015;Bryant et al, 2015;Crosta et al, 2017;Li et al, 2021;Longchamp et al, 2016;Manzella & Labiouse, 2009) of rock avalanches. Therefore, the employment of the slope-break model has certain basis and rationality.…”

Section: Consideration On the Effects Of Variables Initial Conditions...mentioning

confidence: 99%

Basal Stress Fluctuation: Reply to Comment by Cagnoli on “Slope‐Break Collisions: Comment on ‘Insight Into Granular Flow Dynamics Relying on Basal Stress Measurements: From Experimental Flume Tests’ by K. Li et al.”

Wang

Cheng

et al. 2023

JGR Solid Earth

View full text Add to dashboard Cite

We greatly appreciate Professor Cagnoli's attention on our research and his valuable opening comments (Cagnoli, 2022). Many of the issues raised in the comment are of particular interest to the fields of geophysics and granular physics, which should be focused and discussed properly. In the research of Li et al. (2022), a series of flume experiments were conducted aiming to investigate the basal stress fluctuation-related granular flow dynamics. It was proposed that the enhanced particle agitation related to the high magnitude fluctuating stresses with increasing content of coarse particles could contribute to the granular flow mobility. This is the crux of Cagnoli's disagreement and he argues that the existence of the slope-break collision affects the validity of the relationship between the granular flow mobility and grain size. Although the comment is insightful and objective, some of Cagnoli's viewpoints are not in line with our ideas and deviate from the phenomena presented by our experiments. In the following, we will focus on the concerns of Cagnoli and restate our results. In any case, the related issues are very interesting and noteworthy, requiring more in-depth discussion and analysis.

show abstract

“…Van Gassen and Cruden (1990) developed a model in which they describe the increments in runout due to intermittent deposition of a dry granular flow. Later on, some stick-slip motion of the flow down a slope was reported by Bartali et al (2015) They developed a medium-size, densely instrumented experimental flume (Bartali et al 2012, Bartali et al 2015) and found evidence of this intermittent behaviour in polydisperse, dry granular flows and an increment of the affected area through the ejection of ballistic projectiles.…”

Section: Introductionmentioning

confidence: 97%

Runout transition and clustering instability observed in binary-mixture avalanche deposits

Bartali

Rodríguez-Liñán

Cisneros³

et al. 2020

Granular Matter

Self Cite

View full text Add to dashboard Cite

Binary mixtures of dry grains avalanching down a slope are experimentally studied in order to determine the interaction among coarse and fine grains and their effect on the deposit morphology. The distance travelled by the massive front of the avalanche over the horizontal plane of deposition area is measured as a function of mass content of fine particles in the mixture, grain-size ratio, and flume tilt. A sudden transition of the runout is detected at a critical content of fine particles, with a dependence on the grain-size ratio and flume tilt. This transition is explained as two simultaneous avalanches in different flowing regimes (a viscouslike one and an inertial one) competing against each other and provoking a full segregation and a split-off of the deposit into two well-defined, separated deposits. The formation of the distal deposit, in turn, depends on a critical amount of coarse particles. This allows the condensation of the pure coarse deposit around a small, initial seed cluster, which grows rapidly by braking and capturing subsequent colliding coarse particles. For different grain-size ratios and keeping a constant total mass, the change in the amount of fines needed for the transition to occur is found to be always less than 7%. For avalanches with a total mass of 4 kg we find that, most of the time, the runout of a binary avalanche is larger than the runout of monodisperse avalanches of corresponding constituent particles, due to lubrication on the coarse-dominated side or to drag by inertial particles on the fine-dominated side.

show abstract

Stick–slip motion and high speed ejecta in granular avalanches detected through a multi-sensors flume

Cited by 20 publications

References 25 publications

Influence of particle density on flow behavior and deposit architecture of concentrated pyroclastic density currents over a break in slope: Insights from laboratory experiments

Influence of particle density on flow behavior and deposit architecture of concentrated pyroclastic density currents over a break in slope: Insights from laboratory experiments

Basal Stress Fluctuation: Reply to Comment by Cagnoli on “Slope‐Break Collisions: Comment on ‘Insight Into Granular Flow Dynamics Relying on Basal Stress Measurements: From Experimental Flume Tests’ by K. Li et al.”

Runout transition and clustering instability observed in binary-mixture avalanche deposits

Contact Info

Product

Resources

About