Kinematic waves and collision effects in dense fluid–particle flow during hydraulic conveying

Zhang, Yan; Liu, Yang; Ren, Wanlong; Li, Peng; Zhang, Xuhui; Lu, Xiaobing

doi:10.1016/j.ijmultiphaseflow.2023.104643

Cited by 11 publications

(1 citation statement)

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“…Because the internal interactions are resolved, the discrete element method is widely used to investigate the kinematics of debris flows. In general, the volume of fluid based method and the discrete element method are challenging to apply in the numerical simulation of large-scale debris flow due to the high computation cost (usually up to the level of laboratory scale) (Zhang et al, 2024).…”

Section: Introductionmentioning

confidence: 99%

Preliminary Investigation on the Kinetic Characteristics of the Glacial Debris Flows in Tianmo Valley, Tibet Plateau, China

Zhang,

Lyu,

Ren

et al. 2024

JGR Earth Surface

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Glacial debris flows occurring on the Tibetan Plateau consistently result in significant property damage and loss of human life. A comprehensive field investigation was conducted in Tianmo valley along the Sichuan‐Tibet Highway to reveal the dynamics of a debris flow that occurred on 11 July 2018. Furthermore, a depth‐averaged multiphase debris flow model was proposed and employed to reconstruct the characteristics of the debris flow. The model derivation, implementation, evaluation, and application were presented to demonstrate its performance. The Voellmy model was chosen because it adequately accounts for both basal frictional effects and the entrainment phenomenon. The entrainment processes, the ice melting, and the lubrication effect, were also taken into consideration. Based on the numerical results combined with field investigation data, the kinetic characteristics of the glacial debris flow were analyzed. The Tianmo valley has a small area, but the volume and erosion rate of debris flows were much larger than that of two‐phase debris flows in the same location due to ice melting. The simulation results demonstrated that the glacial debris reached a peak velocity of 20 m/s. Additionally, the volume of the debris flow increased by 50% due to the erosion over a short runout distance of approximately 4,000 m. This increase was a result of the high velocity and abundant entrainment sources on the slope. This study aims to improve understanding of the high velocity and destructive potential of debris flows in the Tianmo valley.

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Section: Introductionmentioning

confidence: 99%