Submarine landslide tsunamis, mechanisms of granular flows at multiple scales; a new UK/China multidisciplinary research collaboration
Lead Research Organisation:
University of Edinburgh
Department Name: Sch of Engineering
Abstract
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Publications
Zhu C
(2023)
A granular energy-controlled boundary condition for discrete element simulations of granular flows on erodible surfaces
in Computers and Geotechnics
Barker T
(2021)
Exact solutions for steady granular flow in vertical chutes and pipes
in Journal of Fluid Mechanics
Barker T
(2023)
Well-posedness and ill-posedness of single-phase models for suspensions
in Journal of Fluid Mechanics
| Description | Vertical chutes and pipes are a common component of many industrial apparatuses used in the transport and processing of powders and grains. Using granular rheology theory and numerical simulations, we clearly demonstrate a linear relationship between the chute width and the size of the shear zones at the walls. We proposed a novel configuration with an energy-controlled boundary for the discrete element method to model inclined granular flows on erodible surfaces with the aim of investigating the rheological features of granular flows with entrainment. A recent theory for dense granular suspensions is shown to be dynamically ill-posed for large solid-volume fractions. An alternative well-posed theory is introduced that includes additional dependence on the particle-phase dilation and compression. |
| Exploitation Route | The linear scaling law can be used to understand granular flows in a channel and for the design of chutes for transporting granular materials. The granular-energy boundary condition can be used for discrete element simulations of granular flows on an erodable bed. The well-posed theory for granular suspensions enables correct numerical simulation of flows of such materials. |
| Sectors | Construction,Energy,Environment,Manufacturing, including Industrial Biotechology |
| Description | Tongji University, China |
| Organisation | Tongji University |
| Country | China |
| Sector | Academic/University |
| PI Contribution | We perform particle level and continuum simulations of submarine landslides. |
| Collaborator Contribution | The Tongji team perform experiments and field-scale numerical simulations of submarine landslides. |
| Impact | Geology, Marine geology, Civil Engineering, mathematics |
| Start Year | 2021 |