Influence of bottom roughness and ambient pressure conditions on the emplacement of experimental dam-break granular flows
Sign Up to like & getrecommendations! Published in 2021 at "Granular Matter"
DOI: 10.1007/s10035-021-01125-2
Abstract: Geophysical granular flows occur at the surface of the Earth and other planets with reduced atmospheric pressure. In this paper, we investigate the run-out of dam-break flows of particle-air mixtures with fine ( $$d=75\,\upmu {\hbox… read more here.
Keywords: granular flows; bottom roughness; ambient pressure; pressure ... See more keywords
Dynamic three-dimensional displacement analysis of small-scale granular flows by fringe projection and digital image correlation
Sign Up to like & getrecommendations! Published in 2019 at "Landslides"
DOI: 10.1007/s10346-019-01304-6
Abstract: In this work, we present experimental results that show the feasibility of measuring three-dimensional displacement in models of dry granular avalanches. For this purpose, we have used a technique that is capable to measure simultaneously… read more here.
Keywords: three dimensional; dimensional displacement; projection digital; digital image ... See more keywords
Versatile image-based measurements of granular flows and water wave propagation in experiments of tsunamis generated by landslides
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Visualization"
DOI: 10.1007/s12650-020-00628-z
Abstract: Abstract Landslides falling into water bodies can generate destructive waves, which can be classified as tsunamis. An experimental facility to study this phenomenon has been set up. It consists of a landslide generator releasing gravel… read more here.
Keywords: water; water surface; granular flows; image based ... See more keywords
Continuum modeling of rate-dependent granular flows in SPH
Sign Up to like & getrecommendations! Published in 2017 at "Computational Particle Mechanics"
DOI: 10.1007/s40571-016-0132-5
Abstract: We discuss a constitutive law for modeling rate-dependent granular flows that has been implemented in smoothed particle hydrodynamics (SPH). We model granular materials using a viscoplastic constitutive law that produces a Drucker–Prager-like yield condition in… read more here.
Keywords: modeling rate; rate dependent; law; dependent granular ... See more keywords
Impact forces of granular flows on rigid structures: Comparison between discontinuous (DEM) and continuous (MPM) numerical approaches
Sign Up to like & getrecommendations! Published in 2018 at "Computers and Geotechnics"
DOI: 10.1016/j.compgeo.2018.07.014
Abstract: Abstract The evaluation of forces due to the impact of flow-slides against structures is essential for both risk assessment and protection structure design. However, the impact process is very complex and not fully understood yet.… read more here.
Keywords: impact process; forces granular; impact; impact forces ... See more keywords
A scalable parallel computing SPH framework for predictions of geophysical granular flows
Sign Up to like & getrecommendations! Published in 2020 at "Computers and Geotechnics"
DOI: 10.1016/j.compgeo.2020.103474
Abstract: Abstract This paper presents a parallel computing Smoothed Particle Hydrodynamics (SPH) framework for geophysical granular flows scalable on large CPU clusters. The framework is accomplished by adopting a Message Passing Interface (MPI) approach with domain… read more here.
Keywords: parallel scheme; model; sph framework; geophysical granular ... See more keywords
Effects of obstacle's curvature on shock dynamics of gravity-driven granular flows impacting a circular cylinder
Sign Up to like & getrecommendations! Published in 2021 at "Engineering Geology"
DOI: 10.1016/j.enggeo.2021.106343
Abstract: Abstract Granular flows, such as rock avalanches and debris flows, are gravity-driven and often hit engineering structures that are placed in their paths, generating dynamic impact pressures and potentially causing hazard to infrastructures. To improve… read more here.
Keywords: granular flows; impacting circular; cylinder; gravity driven ... See more keywords
Velocity profiles of granular flows down an inclined channel
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Multiphase Flow"
DOI: 10.1016/j.ijmultiphaseflow.2018.09.002
Abstract: Abstract Granular flows over a static pile have been investigated in an inclined channel. Instead of dividing the granular motions into fast flow with linear velocity profile and creeping motion with exponential velocity profile, we… read more here.
Keywords: granular flows; velocity; flowing layer; velocity profile ... See more keywords
A multiphase meshfree particle method for continuum-based modeling of dry and submerged granular flows
Sign Up to like & getrecommendations! Published in 2018 at "Powder Technology"
DOI: 10.1016/j.powtec.2018.04.071
Abstract: We develop and fully characterize a meshfree Lagrangian (particle) model for continuum-based numerical modeling of dry and submerged granular flows. The multiphase system of the granular material and the ambient fluid is treated as a… read more here.
Keywords: modeling dry; submerged granular; particle; continuum based ... See more keywords
On the validity of the two-fluid-KTGF approach for dense gravity-driven granular flows as implemented in ANSYS Fluent R17.2
Sign Up to like & getrecommendations! Published in 2020 at "Powder Technology"
DOI: 10.1016/j.powtec.2020.01.043
Abstract: Abstract As a subproblem of solid transport in wellbores, we have investigated the cliff collapse problem by means of the Two-Fluid-Model (TFM), where the rheological description of the second phase (sand) is governed by the… read more here.
Keywords: bed; cliff; two fluid; ansys fluent ... See more keywords
Two-phase modelling of submarine granular flows with shear-induced volume change and pore-pressure feedback
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2020.838
Abstract: Abstract Two important issues that arise when using an Eulerian–Eulerian two-phase model to simulate submarine granular flows have not been addressed well: the shear-induced volume change and the resultant pore-pressure feedback. This study develops a… read more here.
Keywords: pressure; submarine granular; shear induced; volume change ... See more keywords