LANS Informal Seminar: Dave May

Seminar Title: Preconditioners for variable viscosity Stokes flow
Speaker: Dave May, Monash University, Australia

Date/Time: 2008-09-29 15:00
Location: Building 221 Conference Room A216

Description:
The numerical solution of a discrete Stokes flow problem is a common component of many computational geodynamic simulations. Such models typically utilize constitutive relationships which may contain large constrasts in material parameters (i.e O(10^8)). In this talk I will describe how to construct an effective preconditioner for the discrete stress tensor gradient and the Schur complement. Numerical experiments will be presented which demonstrate that the proposed preconditioners yield convergence rates which are largely insensitive to the grid size and viscosity contrast.