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LANS Informal Seminar: Ann Almgren
April 16, 2019 @ 10:00 CDT
Seminar Title: AMR for Multiphysics Applications
Speaker: Ann Almgren, Group Lead, Center for Computational Sciences and Engineering, LBNL
Date/Time: 2019-04-16 10:00
Location: Bldg. 240, Rm. 4301
Description:
Adaptive mesh refinement (AMR) is one of several techniques for adapting the
spatial resolution of a simulation in particular regions of the spatial domain.
Block-structured AMR specifically refines the mesh by defining locally structured
regions with finer spatial, and possibly temporal, resolution.
This combination of locally structured meshes within an irregular global hierarchy
is in some sense the best of both worlds in that it enables regular local data access
while enabling greater flexibility in the overall computation.
Originally, block-structured AMR was designed for solving hyperbolic
conservation laws with explicit time-stepping; in this case the changes to solution
methodology in transforming a single-level solver to an AMR-based solver are relatively
straightforward. AMR has come a long way, however, and the more complex the simulation,
the more complex the changes to effectively use AMR. One can even consider
whether to solve the same equations at all levels. In this talk I will give an overview
of block-structured AMR and focus on a few key exemplars for how to think about
adaptivity for multiphysics simulations.