# Fluid Structure Interaction modelling using Lattice Boltzmann and Volume Penalization method

## TL;DR

This paper introduces a novel fluid-structure interaction modeling approach combining Volume Penalization and Lattice Boltzmann methods, enabling efficient computation of rigid body dynamics without complex interface tracking.

## Contribution

The paper presents a new VP-LBM method that simplifies FSI simulations by avoiding interface tracking, using GPU acceleration for efficient computation.

## Key findings

- Accurately computes drag and lift coefficients for various FSI cases
- Achieves results in good agreement with existing literature
- Demonstrates efficiency with GPU implementation

## Abstract

This paper proposes an approach combining the Volume Penalization (VP) and the the Lattice Boltzmann method (LBM) to compute fluid structure interaction involving rigid bodies. The method consists in adding a force term in the LBM formulation, and thus considers the rigid body similar to particular porous media. Using a characteristic function for the solid domain avoids the expensive tracking of the fluid-solid interface employed commonly in LBM to treat FSI problems. The method is applied to three FSI problems and solved using a Graphics Processor Units (GPU) device. The applications focus on the capacity of the method to compute the drag and lift coefficients for various cases : the imposed displacement of a cylinder, the particle sedimentation at a very low Reynolds number and the VIV of a cylinder in a transverse fluid flow. For all cases the VP-LBM approach yields results which are in a good agreement with those of literature.