12338
M. Rieke, T. Trost, R. Grauer
We present a way to combine Vlasov and two-fluid codes for the simulation of a collisionless plasma in large domains while keeping full information of the velocity distribution in localized areas of interest. This is made possible by solving the full Vlasov equation in one region while the remaining area is treated by a 5-moment […]
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Simon Candelaresi, David Pontin, Gunnar Hornig
We present a new code that performs a relaxation of a magnetic field towards a force-free state (Beltrami field) using a Lagrangian numerical scheme. Beltrami fields are of interest for the dynamics of many technical and astrophysical plasmas as they are the lowest energy states that the magnetic field can reach. The numerical method strictly […]
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Axel Huebl, David Pugmire, Felix Schmitt, Richard Pausch, Michael Bussmann
Emerging new technologies in plasma simulations allow tracking billions of particles while computing their radiative spectra. We present a visualization of the relativistic Kelvin-Helmholtz Instability from a simulation performed with the fully relativistic particle-in-cell code PIConGPU powered by 18,000 GPUs on the USA’s fastest supercomputer Titan [1].
R. F. Bird, S. J. Pennycook, S. A. Wright, S. A. Jarvis
We present the first reported OpenCL implementation of EPOCH3D, an extensible particle-in-cell plasma physics code developed at the University of Warwick. We document the challenges and successes of this porting effort, and compare the performance of our implementation executing on a wide variety of hardware from multiple vendors. The focus of our work is on […]
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Kai Germaschewski, William Fox, Narges Ahmadi, Liang Wang, Stephen Abbott, Hartmut Ruhl, Amitava Bhattacharjee
Recent increases in supercomputing power, driven by the multi-core revolution and accelerators such as the IBM Cell processor, graphics processing units (GPUs) and Intel’s Many Integrated Core (MIC) technology have enabled kinetic simulations of plasmas at unprecedented resolutions, but changing HPC architectures also come with challenges for writing efficient numerical codes. This paper describes the […]
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Tilman Dannert, Andreas Marek, Markus Rampp
We have developed GPU versions for two major high-performance-computing (HPC) applications originating from two different scientific domains. GENE is a plasma microturbulence code which is employed for simulations of nuclear fusion plasmas. VERTEX is a neutrino-radiation hydrodynamics code for "first principles"-simulations of core-collapse supernova explosions. The codes are considered state of the art in their […]
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Timothy S. Lyes, K. A. Hawick
Visualising and simulating charged plasma systems present additional challenges to conventional particle methods. Plasmas exhibit multi scale phenomena that often prevent the use of standard localisation approximations. Plasmas as particle systems that emit light are important in many interesting components of games, computer animated movies such as weapons fire, explosions, astronomical effects. They also have […]
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Shinpei Kato, Jason Aumiller, Scott Brandt
Cyber-physical systems (CPS) aim to monitor and control complex real-world phenomena where the computational cost and real-time constraints could be a major challenge. Many-core hardware accelerators such as graphics processing units (GPUs) promise to enhancing computation, leveraging the data parallelism often found in real-world scenarios of CPS, but performance is limited by the overhead of […]
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M. Mehrenberger, C. Steiner, L. Marradi, N. Crouseilles, E. Sonnendrucker, B. Afeyan
This work concerns the numerical simulation of the Vlasov-Poisson set of equations using semi- Lagrangian methods on Graphical Processing Units (GPU). To accomplish this goal, modifications to traditional methods had to be implemented. First and foremost, a reformulation of semi-Lagrangian methods is performed, which enables us to rewrite the governing equations as a circulant matrix […]
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Joshua Payne
GPUs have become a very attractive supplement to traditional high performance computing. GPUs have significantly better performance per cost and power consumption. However, GPUs introduce several additional levels of parallelism that must be contended with. New methods must be developed in order to take full advantage of the capabilities of this architecture. This paper explores […]
Noriyuki Kushida
Many nuclear applications still require more computational power than the current computers can provide. Furthermore, some of them require dedicated machines, because they must run constantly or no delay is allowed. To satisfy these requirements, we introduce computer accelerators which can provide higher computational power with lower prices than the current commodity processors. However, the […]
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Junya Suzuki, Hironori Shimazu, Keiichiro Fukazawa, Mitsue Den
Particle-in-cell (PIC) is a simulation technique for plasma physics. The large number of particles in highresolution plasma simulation increases the volume computation required, making it vital to increase computation speed. In this study, we attempt to accelerate computation speed on graphics processing units (GPUs) using KEMPO, a PIC simulation code package [H. Matsumoto and Y. […]
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