A multiresolution remeshed Vortex-In-Cell algorithm using patches

Johannes Tophøj Rasmussen (1) , Georges-Henri Cottet (2) , Jens Honoré Walther (3)

1 DTU - Danmarks Tekniske Universitet = Technical University of Denmark
2 EDP - Equations aux Dérivées Partielles
3 CSE Lab - Computational Science and Engineering Laboratory

We present a novel multiresolution Vortex-In-Cell algorithm using patches of varying resolution. The Poisson equation relating the fluid vorticity and velocity is solved using Fast Fourier Transforms subject to free space boundary conditions. Solid boundaries are implemented using the semi-implicit formulation of Brinkman penalization and we show that the penalization can be carried out as a simple interpolation. We validate the implementation against the analytic solution to the Perlman test case and by free-space simulations of the onset flow around fixed and rotating circular cylinders and bluff body flows around bridge sections.

Mots clés: Vortex-In-Cell algorithm; Multiresolution; Patches; Brinkman penalization; Fixed and rotating cylinder; Bridge aerodynamics

Domaines: Analyse numérique [math.NA]

Johannes Tophøj Rasmussen, Georges-Henri Cottet, Jens Honoré Walther. A multiresolution remeshed Vortex-In-Cell algorithm using patches. Journal of Computational Physics, 2011, 230 (17), pp.6742-6755. ⟨10.1016/j.jcp.2011.05.006⟩. ⟨hal-00748050⟩