For more information about this meeting, contact Lu Wang, Ludmil Zikatanov.
|Title:||Designing geometric multigrid methods on semi-structured triangular grids|
|Seminar:||CCMA PDEs and Numerical Methods Seminar Series|
|Speaker:||Carmen Rodrigo, Department of Applied Mathematics, University of Saragossa, Spain|
|Multigrid methods appear as the most suitable to handle the algebraic systems arising from discretized PDEs on unstructured grids. We will present geometric multigrid methods which are designed for semi-structured grids. Semi-structured grids are composed of regularly refined patches of initial unstructured meshes and, as we show, a geometric multigrid method can be done very efficiently on such grids.
Since the good performance of the method depends on the particular choice of the components of the algorithm for an individual problem, the local Fourier analysis (LFA) is often used to predict the convergence rates of the multigrid method and to design suitable components. We use LFA on a patch of semi-structured grid to design an optimal and efficient block-wise multigrid algorithm.|
Room Reservation Information
|Date:||03 / 26 / 2013|
|Time:||03:30pm - 04:30pm|