Organisers

• Petros Koumoutsakos (Swiss Federal Institute of Technology Zurich (ETHZ), Switzerland)
• Georges-Henri Cottet (CNRS-IMAG, Grenoble, France)
• Philippe Chatelain (Swiss Federal Institute of Technology Zurich (ETHZ), Switzerland)

Supports

   CECAM

Description

In this tutorial we present recent advances in flow simulations using particles with a focus on fostering an interdisciplinary scientific exchange between scientists from communities as diverse as CFD and Biology, Computer Graphics and Geophysics.

The tutorial will describe advances in particle methods in a comparative, case study driven framework. In this framework we will address for example visual realism of liquid simulations as related to the accuracy of enforcing incompressibility constraints in Smooth Particle Hydrodynamics (SPH) and Vortex Methods (VM). We will discuss the role of advantages and drawbacks for particle simulations when using remeshing, we will present techniques for the effective handling of fluids interacting with solids and free surfaces, we will discuss stochastic amd multiscale particle formulations.

Scientific Objectives

The simulation of fluid flows using particles is becoming increasingly popular in several disciplines. The grid-free character of particles, the flexibility in handling complex flow configurations and the possibility to obtain visually realistic results with a small number of computational elements are some of the main reasons for the success of these methods. In the Computational Fluid Dynamics (CFD) community, the realization that by periodically regularizing the particle locations can lead to highly accurate flow simulations, without detracting from the adaptivity and robustness of the method has led in turn to a renaissance in flow simulations using particles.

Furthermore we will introduce a unifying particle framework that enables the seamless transition between deterministic, stochastic and multiscale simulations using particles.

The workshop will involve hands-on sessions where the participants will be presented with particle algorithms and their hardware implementation to accelerate flow simulations of relevance to real world problems across different disciplines.

References

G.H. Cottet and P. Koumoutsakos, Vortex Methods:Theory and Practice, Cambridge University Press, 2000

P. Koumoutsakos, Multiscale flow simulations using particles, Annual Review Fluid Mechanics, 37, 457-87, 2005

For more publications please visit :
http://www.cse-lab.ethz.ch/publications.html