Time and place: CAVE ECS 1202, April 21, Thursday, 12:30-1:30.

Title: Grid Convergence Studies: Expect Unexpected

Abstract: Grid convergence studies for unstructured finite-volume 
discretizations are discussed. The effects of grid regularity on 
truncation and discretization errors, gradient errors, and iterative 
convergence are shown for model problems ranging from simple 
one-dimensional scalar equations to three-dimensional Reynolds-Averaged 
Navier Stokes equations. Several counterintuitive results illustrate 
the complexity of the relations between grids and numerical errors.

Bio: Dr. Boris Diskin is an NIA Research Fellow and Head of the 
NIA center for High Performance Aerospace Computations (HiPAC). Dr. 
Diskin is an AIAA Associate Fellow. He earned Ph.D. in Applied 
Mathematics at The Weizmann Institute of Science, Israel in 1998. He was 
a Senior Research Scientist at ICASE and joined NIA from its inception 
in 2003. His areas of expertise are finite-volume 
discretization, multidisciplinary adjoint-based optimization, grid 
adaptation, and convergence acceleration methods.