Solid-Fluid Interaction on Particle Flow Maps

TL;DR

This paper introduces a unified particle flow map framework for simulating solid-fluid interactions, enabling coupling of elastic solids with impulse flow maps through novel transfer and force accumulation mechanisms.

Contribution

It presents a new solid-fluid coupling method that unifies fluid and solid components as particle flow maps and integrates traditional models like MPM and IBM.

Findings

Successfully simulates complex vortex dynamics and interactions.

Demonstrates effective coupling of solids and fluids in various scenarios.

Achieves realistic solid-fluid interaction effects in simulations.

Abstract

We propose a novel solid-fluid interaction method for coupling elastic solids with impulse flow maps. Our key idea is to unify the representation of fluid and solid components as particle flow maps with different lengths and dynamics. The solid-fluid coupling is enabled by implementing two novel mechanisms: first, we developed an impulse-to-velocity transfer mechanism to unify the exchanged physical quantities; second, we devised a particle path integral mechanism to accumulate coupling forces along each flow-map trajectory. Our framework integrates these two mechanisms into an Eulerian-Lagrangian impulse fluid simulator to accommodate traditional coupling models, exemplified by the Material Point Method (MPM) and Immersed Boundary Method (IBM), within a particle flow map framework. We demonstrate our method's efficacy by simulating solid-fluid interactions exhibiting strong vortical dynamics, including various vortex shedding and interaction examples across swimming, falling, breezing, and combustion.