Massively Parallel Simulations of Astrophysical Plasmas: Status and Perspectives of the Coast Project
نویسنده
چکیده
The COAST (for Computational Astrophysics) project is a program of massively parallel numerical simulations in astrophysics involving astrophysicists and software engineers from CEA/IRFU Saclay. The scientific objective is the understanding of the formation of structures in the Universe, including the study of largescale cosmological structures and galaxy formation, turbulence in interstellar medium, stellar magnetohydrodynamics and protoplanetary systems. The simulations of astrophysical plasmas are performed on massively parallel mainframes (MareNostrum Barcelona, CCRT CEA France), using 3-D magnetohydrodynamics and N-body parallelized codes developed locally. We present in this paper an overview of the software codes and tools developed and some results of such simulations. We also describe the Saclay SDvision graphical interface, implemented in the framework of IDL Object graphics, our 3-D visualization tool for analysis of the computation results.
منابع مشابه
Visualization of numerical simulations of astrophysical and fusion plasmas with the SDvision code
The new generation of massively parallel mainframes enabled computational physics to make a quantum leap in complexity and size of numerical simulations, especially in the domain of astrophysics. The COAST project at CEA/IRFU at Saclay, started in 2005, involves astrophysicists and software engineers developing simulation codes in magneto-hydrodynamics and generic tools for data structuration a...
متن کاملModulational instability of dust ion acoustic waves in astrophysical dusty plasmas with non thermal electrons
Propagation of dust ion acoustic waves in plasmas composed of nonthermal distributed electrons and stationary dust particles is investigated. Nonlinear Schrdinger equation is derived to describe small amplitude waves, using the reduction perturbation technique. Modulation instability of dust ion acoustic waves is analysed for this system. Parametric investigation indicates that growth rate of...
متن کاملNew analytical soliton type solutions for double layers structure model of extended KdV equation
In this present study the double layers structure model of extended Korteweg-de Vries(K-dV) equation will be obtained with the help of the reductive perturbation method, which admits a double layer structure in current plasma model. Then by using of new analytical method we obtain the new exact solitary wave solutions of this equation. Double layer is a structure in plasma and consists of two p...
متن کاملLarge amplitude dust ion acoustic solitons: considering dust polarity and nonextensive electrons
The characteristics of arbitrary amplitude dust ion acoustic solitary waves (DIASWs) are studied in unmagnetized dusty plasmas whose constituents are cold uid ions, nonextensive electrons and stationary negative/positive dust particles. The pseudopotential approach has been used to investigate the structure of localized waves. It is found that, solitary waves exist in a definite interval for th...
متن کاملInfluences of Small-Scale Effect and Boundary Conditions on the Free Vibration of Nano-Plates: A Molecular Dynamics Simulation
This paper addresses the influence of boundary conditions and small-scale effect on the free vibration of nano-plates using molecular dynamics (MD) and nonlocal elasticity theory. Based on the MD simulations, Large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) is used to obtain fundamental frequencies of single layered graphene sheets (SLGSs) which modeled in this paper as the mo...
متن کامل