Multilevel adaptive particle methods for convection-diffusion equations


M. Bergdorf, G.-H. Cottet, P. Koumoutsakos, Multiscale Modeling and Simulation: A SIAM Interdisciplinary Journal, 4(1), 328-357, 2005



We present novel multilevel particle methods with extended adaptivity in areas where increased resolution is required. We present two complementary approaches as inspired by r-adaptivity and adaptive mesh refinement (AMR) concepts introduced infinite difference and finite element schemes. For the r-adaptivity a new class of particle-based mapping functions is introduced, while the particle AMR method uses particle remeshing in overlapping domains as a key element. The advantages and drawbacks of the proposed particle methods are illustrated based on results from the solution of one-dimensional convection-diffusion equations, while the extension of the method to higher dimensions is demonstrated in simulations of the inviscid evolution of an elliptical vortex.


DOI: 10.1137/040602882