期刊
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
卷 44, 期 11, 页码 1548-1569出版社
WILEY
DOI: 10.1002/nag.3077
关键词
numerical modelling; smoothed particle hydrodynamics; soil-water interaction; underwater geohazards
资金
- Australian Research Council Centre of Excellence for Geotechnical Science and Engineering
- Fugro Chair in Geotechnics
- Lloyd's Register Foundation Chair
- Centre of Excellence in Offshore Foundations
- Shell EMI Chair in Offshore Engineering
Soil-water interaction is a pivotal process in many underwater geohazards such as underwater landslides where soil sediments gradually evolve into turbidity currents after interactions with ambient water. Due to the large deformations, multiphase interactions and phase changes this involves, investigations from numerical modelling of the transition process have been limited so far. This study explores a simple numerical replication of such soil-water mixing with respect to changes in average strength using smoothed particle hydrodynamics (SPH). A uniform viscoplastic model is used for both the solid-like and fluid-like SPH particles. The proposed numerical solution scheme is verified by single-phase dam break tests and multiphase simple shear tests. SPH combinations of solid-like and fluid-like particles can replicate the clay-water mixture as long as the liquidity index of the solid-like particles is larger than unity. The proposed numerical scheme is shown to capture key features of an underwater landslide such as hydroplaning, water entrainment and wave generation and thus shows promise as a tool to simulate the whole process of subaquatic geohazards involving solid-fluid transition during mass transport.
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