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Non-intrusive hierarchical coupling strategies for multi-scale simulations in gravitational dynamics
Simon Portegies Zwart, Inti Pelupessy, Carmen Martinez-Barbosa +2
Hierarchical code coupling strategies make it possible to combine the results of individual numerical solvers into a self-consistent symplectic solution. We explore the possibility…
Bonsai-SPH: A GPU accelerated astrophysical Smoothed Particle Hydrodynamics code
Jeroen Bédorf, Simon Portegies Zwart
We present the smoothed-particle hydrodynamics simulation code, Bonsai-SPH, which is a continuation of our previously developed gravity-only hierarchical -body code (called Bons…
Numerical verification of the microscopic time reversibility of Newton's equations of motion: Fighting exponential divergence
Simon Portegies Zwart, Tjarda Boekholt
Numerical solutions to Newton's equations of motion for chaotic self gravitating systems of more than 2 bodies are often regarded to be irreversible. This is due to the exponential…
SiMon: Simulation Monitor for Computational Astrophysics
Penny Xuran Qian, Maxwell Xu Cai, Simon Portegies Zwart +1
Scientific discovery via numerical simulations is important in modern astrophysics. This relatively new branch of astrophysics has become possible due to the development of reliabl…
From Thread to Transcontinental Computer: Disturbing Lessons in Distributed Supercomputing
Derek Groen, Simon Portegies Zwart
We describe the political and technical complications encountered during the astronomical CosmoGrid project. CosmoGrid is a numerical study on the formation of large scale structur…
Computational Gravitational Dynamics with Modern Numerical Accelerators
Simon Portegies Zwart, Jeroen Bédorf
We review the recent optimizations of gravitational -body kernels for running them on graphics processing units (GPUs), on single hosts and massive parallel platforms. For each…