Minisymposium Presentation

Despite their inherent diffusivity and the additional effort required for modelling turbulent eddies on the subgrid scale, Eulerian-based approaches are nowadays widely accepted tools for the simulation of turbulent fluid flows. Lagrangian methods, on the other hand, represent a viable alternative as they explicitly model the small-scale turbulence at the cost of higher computational complexity. In this talk I present a new Lagrangian-based approach that is based on deformable elliptical parcels which has proven to be highly effective in resolving turbulence. The Elliptical Parcel-In-Cell (EPIC) method represents a fluid flow with a set of space-filling ellipsoids that deform due to the local strain (velocity gradient). While extremely elongated parcels are split, very small parcels are merged with their nearest other parcel, resulting in a natural process of turbulent mixing. Performance benchmarkswill demonstrate its scalability up to 16,384 cores.