MPMICE: A hybrid MPM-CFD model for simulating coupled problems in porous media. Application to earthquake-induced submarine landslides

TL;DR

This paper introduces a hybrid computational model combining MPM and CFD techniques to simulate complex soil-fluid-structure interactions during earthquake-induced submarine landslides, aiding risk assessment of offshore structures.

Contribution

The paper presents a novel integrated MPM-CFD model specifically designed for coupled porous media and fluid-structure interaction problems in seismic events.

Findings

Model accurately captures interactions between sediments, seawater, and structures.

Simulation of submarine landslides demonstrates the model's effectiveness.

Potential to assess impacts on offshore infrastructure.

Abstract

In this paper, we describe a soil-fluid-structure interaction model that combines soil mechanics (saturated sediments), fluid mechanics (seawater or air), and solid mechanics (structures). The formulation combines the Material Point Method, which models large deformation of the porous media and the structure, with the Implicit Continuous-fluid Eulerian, which models complex fluid flows. We validate the model and simulate the whole process of earthquake-induced submarine landslides. We show that this model captures complex interactions between saturated sediment, seawater, and structure, so we can use the model to estimate the impact of potential submarine landslides on offshore structures.