A new cut-cell algorithm for DSMC simulations of rarefied gas flows around immersed moving objects

Direct Simulation Monte Carlo (DSMC) is a widely applied numerical technique to simulate rarefied gas flows. For flows around immersed moving objects, the use of body fitted meshes is inefficient, whereas published methods using cut-cells in a fixed background mesh have important limitations. We present a novel cut-cell algorithm, which allows...

Robustness improvement of polyhedral mesh method for airbag deployment simulations

In this project the problem of determining the inner and outer regions of the computational domain for an airbag deployment simulation is addressed. One approach to perform such simulation is via the structural equations of motion for the airbag fabric dynamics, Euler equations of fluid motion for the fluid inside the airbag and a coupling...

Viscous wave interaction with structures using adapting quadtree grids and cartesian cut cells

This work involves the application of adaptive hierarchical grids to free surface Navier-Stokes simulation of viscous waves in a stationary tank and their interaction with a cylinder. Adapting quadtree grids are combined with a volume of fluid (VoF) approach, in which a high resolution interface capturing scheme is used for advection of the...

A level set method for particle dissolution in a binary alloy

A mathematical model is proposed for the dissolution of stoichiometric particles in binary alloys occurring during the heat treatments of as-cast aluminium alloys prior to hot extrusion. The Level Set method is used to capture the interface location implicitly. The front velocity, only dened on the moving interface, should be advected to the...