Supernova-driven turbulence with Pencil Code accelerated by Astaroth GPU

Description

Turbulence and the multiphase structure of the ISM are integral to understanding galactic evolution and properties. Supernovae are the primary driver of turbulence and the separation of the ISM into distinct cold, warm and hot phases in statistical pressure equilibrium. Magnetic fields are also dynamically effective to astrophysical evolution at different timescales over a range of scales from stars, star formation through to galactic discs and galaxy clusters. Generation of realistic topology and strength for galactic magnetic fields numerically require dynamo acting concurrently at multiple modes from the fast small scale (turbulent) dynamo (SSD) coherent at the eddy scale of the turbulence (Gyr). Such numerical models with sufficient resolution to capture the SSD and large enough domain to model the LSD are challenged by long integration times and the necessity of small time steps. The Pencil Code has been very effective at modelling these dynamo modes concurrently. Here we couple Pencil Code with the GPU PDE solver Astaroth to accelerate the time integration by a factor of order ten times. This offers huge potential, with wall time of years to integrate such models reduced to months. The acceleration is applicable to many other MHD and astrophysical problems.

Aikajakso	13 syysk. 2024
Tapahtuman otsikko	Annual Meeting of the Astronomische Gesellschaft: Star formation across cosmic time
Tapahtuman tyyppi	Conference
Sijainti	Köln, SaksaNäytä kartalla
Tunnustuksen arvo	International