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DTSTAMP:20210916T132529Z
LOCATION:Louis Favre
DTSTART;TZID=Europe/Stockholm:20210705T153000
DTEND;TZID=Europe/Stockholm:20210705T173000
UID:submissions.pasc-conference.org_PASC21_sess111@linklings.com
SUMMARY:Advances in Computational Geosciences, Part I
DESCRIPTION:Minisymposium\n\nComputational geosciences leverage advanced c
omputational methods to improve our understanding of the interiors of Ear
th and other planets. They combine numerical models to understand the curr
ent state of physical quantities describing a system, to predict their fut
ure states, and to infer unknown parameters of those models from data meas
urements. Such models produce highly nonlinear numerical systems with extr
emely large numbers of unknowns.\nThe ever-increasing power and availabili
ty of High Performance Computing (HPC) facilities offers researchers unpre
cedented opportunities to continually increase both the spatiotemporal res
olution and the physical complexity of their numerical models. However, th
is requires complex numerical methods and their implementations that can h
arness the HPC resources efficiently for problem sizes of billions of degr
ees of freedom.\nThe goal of this minisymposium is to bring scientists who
work in theory, numerical methods, algorithms and scientific software eng
ineering for scalable numerical modelling and inversion. Examples include,
but are not limited to, geodynamics, multi-phase geophysical flow modelli
ng, seismic wave propagation and imaging, seismic tomography and inversion
of large data sets, development of elaborate workflows including HPC for
imaging problems, ice-sheet modelling, and urgent computing for natural ha
zards.\n\nTowards Non-Uniform Staggered Grids with DMStag\n\nSanan\n\nWe p
resent recent developments related to the computations on staggered grids,
enable by the StagBL project and the DMStag component in PETSc. These are
motivated by the need to solve large geophysical Stokes problems with hig
hly-variable viscosity. Here, we discuss capabilities to construct scalabl
...\n\n---------------------\nFlexible Computational Abstractions in the D
esign and Implementation of Multiphysics Preconditioners\n\nMitchell\n\nSm
all block overlapping, and non-overlapping, Schwarz methods are theoretica
lly highly attractive as multigrid smoothers for a wide variety of problem
s that are not amenable to point relaxation methods. Examples include mono
lithic Vanka smoothers for Stokes, overlapping vertex-patch decompositions
f...\n\n---------------------\nSolving Nonlinear Partial Differential Equ
ations on GPU Supercomputers Using Julia\n\nOmlin, Räss, Keepfer, Kwasniew
ski, Malvoisin...\n\nWe present a self-contained approach for the developm
ent of massively scalable multi-GPU solvers for coupled nonlinear systems
of partial differential equations (PDE) in Julia. The approach encompasses
numerics, implementation and performance evaluation. It relies on the usa
ge of a powerful stencil-...\n\n---------------------\nA Multi-GPU Superco
mputing Framework for 3D High-Resolution Forward and Inverse Iterative Sol
vers in Julia\n\nRäss, Reuber, Holbach, Omlin\n\nAlongside fault zones, po
rous rocks exhibit efficient pathways for fluids to migrate from depth to
surface. Nonlinear hydromechanical processes suggest that buoyant fluid po
ckets trapped within creep-activated porous host rocks can accumulate and
migrate to the surface as solitary waves of porosity....\n\n\nDomain: CS a
nd Math, Climate and Weather, Physics, Solid Earth Dynamics
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