High-Performance Computing in Astrophysical Simulations

International Conference on Computer Simulation in Physics and Beyond 2015

物理学;计算机科学

Protasov, Viktor^1,2 ; Serenko, Alexander^2 ; Nenashev, Vladislav^2 ; Kulikov, Igor^1,2 ; Chernykh, Igor^1

Institute of Computational Mathematics and Mathematical Geophysics SB RAS, 6-th Lavrentyev avenue, Novosibirsk, Russia^1

Novosibirsk State Technical University, 20-th Karl Marks avenue, Novosibirsk, Russia^2

关键词: Astrophysical objects;    Astrophysical simulations;    Collisionless;    Gas component;    High performance computing;    Parallel implementations;    Protoplanetary disks;    Two-phase model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/681/1/012022/pdf
DOI  :  10.1088/1742-6596/681/1/012022

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The author's approach for simulating of multiscale astrophysical objects with using of supercomputers is described in the paper. Astrophysical objects consists of several components with different nature, and as a result are described with different mathematical models. This fact leads us to need of formulation of mathematical model and numerical method for each component. The two-phase model (gas + particles) was used in case of simulation of protoplanetary disks. The numerical method and details of parallel implementation for that model were disclosed. The mathematical model for galactic objects, describing stellar component and dark matter, based on the first momenta of Boltzmann equation was built. Such approach allows us to use unified numerical method to describe collisionless and gas component of galaxies.