Splinter Meeting Computation

Computational Astrophysics

Time: Thursday September 24, 09:00-13:00 and Friday September 25, 09:00-13:00 and 14:00-18:00 CEST (UTC+2)

Room: virtual room B

Convenor(s): Philipp Grete [1], Rolf Kuiper [2], Diederik Kruijssen [3]
[1] Michigan State University, [2] U Tübingen, [3] U Heidelberg

Numerical simulations are a key pillar of modern research. This is especially true for astrophysics where the availability of detailed spatial and temporal data from observations is often sparse for many systems of interest. In many areas large-scale simulations are required, e.g., in support of the interpretation of observations, for theoretical modeling, or in the planning of experiments and observation campaigns. The need and and relevance of large-scale simulations in astrophysics is reflected in a significant share of 25-30% of the overall German supercomputing time. While the supercomputing landscape has been stable for a long time, it started to change in recent years on the path towards the first exascale supercomputer. New technologies such as GPUs for general purpose computing, ARM based platforms (versus x86 platforms), and manycore systems in general have been introduced and require to rethink and revisit traditional algorithms and methods.
This splinter meeting will bring together experts in computational astrophysics from all fields covering (but not limited to) fluid-based methods (from hydrodynamics to general relativistic magnetohydrodynamics), kinetic simulations, radiation transport, chemistry, and N-body dynamics applied to astrophysical systems on all scales, e.g., supernovae, planetary and solar dynamos, accretion disks, interstellar, circumgalactic, and intracluster media, or cosmological simulations.
The goal of this meeting is to present and discuss recent developments in computational astrophysics and their application to current problems. Thus, contributions involving large-scale simulations and new methods/algorithms are specifically welcome.
In addition to astrophysical results obtained from simulations, speakers are also encouraged to highlight numerical challenges they encountered and how they addressed those in their codes. These may include, but are not limited to, new algorithms (e.g., higher-order methods), changing HPC environments (e.g., manycore, GPUs, or FPGAs), or data storage (e.g., availability of space, sharing, or long term retention).


Thursday September 24, 09:00-13:00 Computational Astrophysics - Session I (virtual room B)

09:02  Robert John James Grand:
Pushing to cosmological zoom simulations to new limits: exquisitely resolved galactic dynamics

09:28  Marta Reina-Campos:
Formation and evolution of stellar clusters in a cosmological context

09:54  Diego Sotillo Ramos:
The diverse evolutionary pathways of Milky Way-like galaxies with TNG50

10:20  Md Rasel Hossen:
Influence of local environment on weak lensing statistics

10:45  Break

11:17  Shashwata Ganguly:
SILCC-zoom: gravo-turbulence or global hierarchical collapse?

11:43  Asmita Bhandare:
Zooming in on star and disk formation

12:09  Sambaran Banerjee:
Stellar-mass black holes in young and open clusters and their role in gravitational-wave generation

12:35  G. André Oliva:
Effects of resolution on disk fragmentation in the context of massive star formation

Friday September 25, 09:00-13:00 Computational Astrophysics - Session II (virtual room B)

09:02  Benjamin Keller:
Empirically Motivated Feedback in Galaxy Formation

09:28  Stefanie Walch:
The dispersal of molecular clouds by stellar feedback

09:54  Jindra Gensior:
The Elephant in the Bathtub: When the physics of star formation drive the baryon cycle of galaxies

10:20  Ulrich Steinwandel:
On the importance of the hydrodynamic method in galaxy simulations with resolved feedback

10:45  Break

11:17  Moritz Beutel:
A hybrid code for coagulation and viscous stirring in protoplanetary disks

11:43  Moritz Lietzow:
Exoplanetary atmospheres: Three-dimensional continuum radiative transfer of polarized radiation

12:09  Natascha Manger:
High Resolution Parameter Study of the Vertical Shear Instability

12:35  Daniel Carrera:
Protoplanetary Disk Rings as Sites for Planetesimal Formation

Friday September 25, 14:00-18:00 Computational Astrophysics - Session III (virtual room B)

14:02  Klaus Dolag:
OpenGadget3 on GPUS

14:28  Luigi Iapichino:
HPC performance optimisation as tool for computational astrophysics: experiences and lessons learnt

14:54  Miikka Väisälä:
Exploring small- and large-scale dynamo growth with graphics processing units

15:20  Forrest Glines:
Performance Portability in Practice: Challenges and Successes with K-Athena (MHD) & Parthenon (AMR)

15:45  Break

16:15  Joseph O'Leary:
Constraining the merging timescales of close galaxy pairs through empirical modelling

16:36  Milena Valentini:
The art of sub-resolution modelling

16:57  Johann Higl:
Low Mach Number Simulations and Their Need for Well-Balancing

17:18  Andre Klepitko:
TreeRay-RP: a novel method for radiation pressure from reprocessed radiation

17:39  Enrico Garaldi:
Dynamic Zoom Simulations: a fast, adaptive algorithm for simulating lightcones

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