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SCHEDULE: NOV 16-21, 2014
When viewing the Technical Program schedule, on the far righthand side is a column labeled "PLANNER." Use this planner to build your own schedule. Once you select an event and want to add it to your personal schedule, just click on the calendar icon of your choice (outlook calendar, ical calendar or google calendar) and that event will be stored there. As you select events in this manner, you will have your own schedule to guide you through the week.
Parallel High-Order Geometric Multigrid Methods on Adaptive Meshes for Highly Heterogeneous Nonlinear Stokes Flow Simulations of Earth's Mantle
SESSION: Poster Reception
EVENT TYPE: Posters, Best Poster Finalist
TIME: 5:15PM - 7:00PM
AUTHOR(S):Johann Rudi, Hari Sundar, Tobin Isaac, Georg Stadler, Michael Gurnis, Omar Ghattas
ROOM:New Orleans Theater Lobby
ABSTRACT:
The simulation of Earth's mantle flow with associated plate motion at global
scale is challenging due to (1) the severe nonlinear rheology, (2) the
viscosity variations, and (3) the widely-varying spatial scales inherent in the
problem. We discretize the governing nonlinear incompressible Stokes equations
using high-order finite elements on highly adapted meshes, which allow us to
resolve plate boundaries down to a few hundred meters. Crucial components in
our scalable solver are an efficient, collective communication-free, parallel
implementation of geometric multigrid for high-order elements, the use of a
Schur complement preconditioner that is robust with respect to extreme
viscosity variations, and the use of an inexact Newton solver combined with
grid-continuation methods. We present results based on real Earth data that
are likely the most realistic global scale mantle flow simulations conducted to
date.
Chair/Author Details:
Johann Rudi - University of Texas at Austin
Hari Sundar - University of Utah
Tobin Isaac - University of Texas at Austin
Georg Stadler - University of Texas at Austin
Michael Gurnis - California Institute of Technology
Omar Ghattas - University of Texas at Austin
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