Influence of grain bidispersity on dense granular flow in a two-dimensional hopper
Sign Up to like & getrecommendations! Published in 2022 at "Powder Technology"
DOI: 10.1016/j.powtec.2022.117271
Abstract: Discrete element method is conducted to investigate the bidisperse dense granular flow having big and small grains in a two dimensional hopper. A half-circular dynamical force arch is observed above the outlet and Beverloo’s law… read more here.
Keywords: dimensional hopper; flow; dense granular; two dimensional ... See more keywords
Non-local continuum modelling of steady, dense granular heap flows
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2017.554
Abstract: Dense granular heap flows are common in nature, such as during avalanches and landslides, as well as in industrial flows. In granular heap flows, rapid flow is localized near the free surface with the thickness… read more here.
Keywords: flow rate; continuum; granular heap; dense granular ... See more keywords
Material stability and instability in non-local continuum models for dense granular materials
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2019.311
Abstract: A class of common and successful continuum models for steady, dense granular flows is based on the $\unicode[STIX]{x1D707}(I)$ model for viscoplastic grain-inertial rheology. Recent work has shown that under certain conditions, $\unicode[STIX]{x1D707}(I)$ -based models display… read more here.
Keywords: non local; model; continuum models; dense granular ... See more keywords
Segregation forces in dense granular flows: closing the gap between single intruders and mixtures
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2022.12
Abstract: Abstract Using simulations and a virtual-spring-based approach, we measure the segregation force, $F_{seg},$ in size-bidisperse sphere mixtures over a range of concentrations, particle-size ratios and shear rates to develop a semiempirical model for $F_{seg}$ that… read more here.
Keywords: granular flows; flows closing; segregation forces; segregation ... See more keywords
Regularization by compressibility of the μ(I) model of dense granular flow
Sign Up to like & getrecommendations! Published in 2018 at "Physics of Fluids"
DOI: 10.1063/1.5040776
Abstract: The following article deals with the role of compressibility in regularizing the well-known μ(I) model, i.e., eliminating the short-wavelength (Hadamard) instability revealed by Barker et al. [“Well-posed and ill-posed behaviour of the μ(I)-rheology for granular… read more here.
Keywords: granular flow; rheology; compressibility; fluid mech ... See more keywords
Dynamic shear jamming in dense granular suspensions under extension.
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review E"
DOI: 10.1103/physreve.95.012603
Abstract: Unlike dry granular materials, a dense granular suspension like cornstarch in water can strongly resist extensional flows. At low extension rates, such a suspension behaves like a viscous fluid, but rapid extension results in a… read more here.
Keywords: velocity; shear jamming; dense granular; extension ... See more keywords
Segregation of large particles in dense granular flows suggests a granular Saffman effect
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review Fluids"
DOI: 10.1103/physrevfluids.3.074303
Abstract: We report on the scaling between the lift force and the velocity lag experienced by a single particle of different size in a monodisperse dense granular chute flow. The similarity of this scaling to the… read more here.
Keywords: lift force; segregation large; large particles; dense granular ... See more keywords
Inertial Force Transmission in Dense Granular Flows.
Sign Up to like & getrecommendations! Published in 2021 at "Physical review letters"
DOI: 10.1103/physrevlett.126.118002
Abstract: Dense granular flows are well described by several continuum models; however, their internal dynamics remain elusive. This study explores the contact force distributions in simulated steady and homogenous shear flows. The results demonstrate the existence… read more here.
Keywords: granular flows; dense granular; force; force transmission ... See more keywords