Consolidation of freshly deposited cohesive and non-cohesive sediment: particle-resolved simulations

We analyze the consolidation of freshly deposited cohesive and non-cohesive sediment by means of particle-resolved direct Navier-Stokes simulations based on the Immersed Boundary Method. The computational model is parameterized by material properties and does not involve any arbitrary calibrations....

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Bibliographic Details
Published in:arXiv.org 2019-06
Main Authors: Vowinckel, Bernhard, Biegert, Edward, Luzzatto-Fegiz, Paolo, Meiburg, Eckart
Format: Article
Language:English
Subjects:
Cohesion
Computational fluid dynamics
Computer simulation
Consolidation
First principles
Material properties
Parameterization
Sediments
Settling
Simulation
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Summary:We analyze the consolidation of freshly deposited cohesive and non-cohesive sediment by means of particle-resolved direct Navier-Stokes simulations based on the Immersed Boundary Method. The computational model is parameterized by material properties and does not involve any arbitrary calibrations. We obtain the stress balance of the fluid-particle mixture from first principles and link it to the classical effective stress concept. The detailed datasets obtained from our simulations allow us to evaluate all terms of the derived stress balance. We compare the settling of cohesive sediment to its non-cohesive counterpart, which corresponds to the settling of the individual primary particles. The simulation results yield a complete parameterization of the Gibson equation, which has been the method of choice to analyze self-weight consolidation.
ISSN:2331-8422