Free Surface Flows with Moving and Deforming Objects for LBM

We will present an algorithm to handle moving and deforming objects for free surface fluid simulations with the lattice Boltzmann method (LBM). To achieve this we extend methods available for flows without a free surface to enables simulations of moving objects with varying surface roughness, two-way coupled interaction and improved mass conservation. We furthermore show how to efficiently initialize boundary conditions for the moving objects from an arbitrary triangle mesh. The triangulation of the free surface can be improved by removing the interface between fluid and an immersed object. We will demonstrate the capabilities of our approach with two simpler test cases, and a more complicated simulation using an animated character as obstacle.