The importance of numerical simulations in astrophysics has increased
significantly over the past few years. Their aims are diverse, ranging
from pure theoretical studies that includes more and more physics
(dynamics, chemistry, radiative transfer) to detailed comparisons with the
observations, their preparation or with the design and conception of space
and ground based instruments.
Such a massive change is, of course, not limited to astrophysics, but is
widespread accross all fields of fundamental research. It results largely
from the spectacular increase of the gigantic computing power of
modern supercomputers that are now available to researchers both at
the national (through GENCI) and european level (trough PRACE). It is
accompanied by profound evolutions of the methods used by specialists of
numerical simulations. More and more research projects are now performed
in close collaborations with software engineers. With exascale computers
coming soon, such a professionalism of high performance computing (HPC) is
expected to become more and more unavoidable. Like the other communities
in France, astrophysicists must prepare to that transition.
In this context, we organized a workshop during the french astronomy week
that gathered experts in HPC in order to present the current state of the
art of french numerical simulations in astrophysics. By bringing together
an audience with varied scientific interest, the goal of the workshop was
to generate discussions about current technical problem and numerical
methods as well as to discuss their future evolutions.
SOC: G. Aulagnier, J. Blaizot, B.
Dintrans, G. Dubus, S. Fromang, P. Hennebelle, P. Le Petit, A. Marchaudon