Corpus ID: 237563249

The effect of grain size on erosion and entrainment in dry granular flows

  title={The effect of grain size on erosion and entrainment in dry granular flows},
  author={Eranga Dulanjalee and Franccois Guillard and James Lindsay Baker and Benjy Marks},
The entrainment of underlying erodible material by geophysical flows can significantly boost the flowing mass and increase the final deposition extent. The particle size of both the flowing material and the erodible substrate influence the entrainment mechanism and determine the overall flow dynamics. This paper examines these mechanisms experimentally by considering the flow of particles over an erodible bed using different particle size combinations for the incoming flow and the base layer in… Expand


Modeling of Entrainment in Debris Flow Analysis for Dry Granular Material
Debris flow entrainment refers to the increase in mass by way of erosion of the channel beds or undermining the channel banks. Entrainment makes the calculation of travel distance and velocities ofExpand
An analysis of the entrainment effect of dry debris avalanches on loose bed materials
The experimental results show that both the entrained materials and the maximum erosion depth are increased with increasing mass of the debris avalanche and decreasing substrate thickness, which can greatly influence the mass movement process of a debris avalanche. Expand
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The present study describes entraining characteristics of bed material into debris flow, based on flume tests, numerical and dimensional analyses. Flume tests are conducted to investigate influencesExpand
Research on the Entrainment of Path Material by the Granular Flow
  • Yunyun Fan, Fengyuan Wu, M. Li, Li Liang
  • Materials Science
  • KSCE Journal of Civil Engineering
  • 2019
The experiment and numerical simulation were used to study the entrainment of path material by the granular flow. The effects of several factors on the entrainment were observed through theExpand
Erosion and mobility in granular collapse over sloping beds
[1] We describe laboratory experiments of granular material flowing over an inclined plane covered by an erodible bed, designed to mimic erosion processes of natural flows travelling over depositsExpand
Fundamental changes of granular flow dynamics, deposition, and erosion processes at high slope angles: Insights from laboratory experiments
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Grain-size segregation and levee formation in geophysical mass flows
[1] Data from large-scale debris-flow experiments are combined with modeling of particle-size segregation to explain the formation of lateral levees enriched in coarse grains. The experimental flowsExpand
Elementary theory of bed‐sediment entrainment by debris flows and avalanches
[1] Analyses of mass and momentum exchange between a debris flow or avalanche and an underlying sediment layer aid interpretations and predictions of bed-sediment entrainment rates. A preliminaryExpand
Entrainment of bed material by Earth‐surface mass flows: Review and reformulation of depth‐integrated theory
Earth-surface mass flows such as debris flows, rock avalanches, and dam-break floods can grow greatly in size and destructive potential by entraining bed material they encounter. Increasing use ofExpand
Measuring grain size fractions of bidisperse granular materials using X-ray radiography.
This work proposes a technique to determine the volume fractions of the grain sizes in bidisperse granular materials with the aid of dynamic X-ray radiography and shows that this technique can measure the relative concentration of the two species, which is determined via a heuristic calibration parameter. Expand