Viscous Effects on Granular Mixtures in a Rotating Drum

Cabrera, Miguel Angel; Gollin, Devis; Kaitna, Roland; Wu, Wei

doi:10.1007/978-3-319-11053-0_6

Cited by 2 publications

(3 citation statements)

References 19 publications

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“…It consists of a cylindrical channel section connected to a motor that drives its motion at a controlled angular velocity. The drum has a rectangular crosssection with a transparent acrylic wall, and it contains debris material that is dragged by the roughened base at a constant velocity until the material is released under the influence of gravity (Cabrera et al 2015). This recirculating process generates long periods of steady-state flow conditions.…”

Section: Rotating-drum Flume Modelsmentioning

confidence: 99%

“…This recirculating process generates long periods of steady-state flow conditions. One of the inherent limitations of these models is that debris material becomes attached to the roughened base, and it subsequently drops from the base or is trapped on the inner roof of the drum, which results in a gradual decrease in the debris volume during a test (Cabrera et al 2015, Leonardi et al 2015. Six typical flow regimes have been identified based on the operational conditions (e.g.…”

Section: Rotating-drum Flume Modelsmentioning

confidence: 99%

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Flume Modeling of Debris Flows

Choi,

Ng,

Liu

2024

Geoenvironmental Disaster Reduction

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Debris flows are complex mixtures of water and soil, which range from clay to boulder size, that surge downslope under the influence of gravity. Debris flows are unique compared to other types of landslides (e.g., rock avalanches; dry granular flows) because their dynamics are governed by both the soil grains and interstitial fluid. On one hand, debris flows may exhibit some features of dry granular flows, such as particle size segregation. On the other hand, contact and collisional grain stresses are strongly influenced by the viscosity and excess pressure of the interstitial fluid. Furthermore, debris flows travel over complex erodible boundaries and have been reported to reach volumes of up to 10 9 m 3 and travel kilometers in length. Evidently, the scale and dynamics of natural debris flows are complex and difficult to reproduce. One of the most common approaches to investigate the dynamics of debris flows is by conducting experiments, which provide idealized and high-quality evidence to evaluate theoretical and numerical models. This chapter provides an overview of the fundamental principles, scaling considerations, commonly adopted setups (e.g., flumes and geotechnical centrifuge), and the state-of-the-art in instrumentation and image analysis for modeling debris flows.

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Section: Rotating-drum Flume Modelsmentioning

confidence: 99%

Section: Rotating-drum Flume Modelsmentioning

confidence: 99%

Flume Modeling of Debris Flows

Choi,

Ng,

Liu

2024

Geoenvironmental Disaster Reduction

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“…10 Finally, rotating drum devices are often employed in geologic research to study flowing layers or avalanches of soil and debris. [15][16][17] Also in this application, the influence of the interstitial medium on the granular flow is of major interest, contributing to the study of a wide variety of naturally occurring phenomena, such a submarine landslides.…”

mentioning

confidence: 99%

Experiments on floating bed rotating drums using magnetic particle tracking

et al. 2022

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Magnetic particle tracking (MPT) was employed to study a rotating drum filled with cork particles, using both air and water as interstitial medium. This noninvasive monitoring technique allows for the tracking of both particle translation and rotation in dry granular and liquid-solid systems. Measurements on the dry and floating bed rotating drum were compared and detailed analysis of the bed shape and velocity profiles was performed. It was found that the change of particle-wall and particleparticle interaction caused by the presence of water significantly affects the bed behavior. The decreased friction leads to slipping of the particles with respect to the wall, rendering the circulation rate largely insensitive to increased drum speed. It was also found that the liquid-particle interaction is determining for the behavior of the flowing layer. The well-defined experiments and in-depth characterization performed in this study provide an excellent validation case for multiphase flow models.

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Viscous Effects on Granular Mixtures in a Rotating Drum

Cited by 2 publications

References 19 publications

Flume Modeling of Debris Flows

Flume Modeling of Debris Flows

Experiments on floating bed rotating drums using magnetic particle tracking

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