This research aims to understand the dynamics of immersed granular flow. We use both coarse-grid and fully-resolved fluid-particle coupling approaches, combined with small-scale laboratory experiments, to look at granular column collapses in a viscous fluid.

Many parameters control the dynamics of immersed granular flow, including particle size, particle density, fluid density, fluid viscosity, column aspect ratio (Jing et al., 2018) and column packing density (Yang et al., 2020). We are seeking for dimensionless parameters combining the effects of all these parameters, which are expect to capture different flow regimes where distinct flow dynamics are observed (Jing et al., 2019).

  1. Jing, L., Yang, G. C., Kwok, C. Y., & Sobral, Y. D. (2018). Dynamics and scaling laws of underwater granular collapse with varying aspect ratios. Physical Review E, 98(4), 042901. https://doi.org/10.1103/PhysRevE.98.042901
  2. Yang, G. C., Jing, L., Kwok, C. Y., & Sobral, Y. D. (2020). Pore-scale simulation of immersed granular collapse: Implications to submarine landslides. Journal of Geophysical Research: Earth Surface, 125(1), e2019JF005044. https://doi.org/10.1029/2019JF005044
  3. Jing, L., Yang, G. C., Kwok, C. Y., & Sobral, Y. D. (2019). Flow regimes and dynamic similarity of immersed granular collapse: A CFD-DEM investigation. Powder Technology, 345, 532–543. https://doi.org/10.1016/j.powtec.2019.01.029