Filters








58,694 Hits in 10.7 sec

A Solver for Massively Parallel Direct Numerical Simulation of Three-Dimensional Multiphase Flows [article]

S. Shin, J. Chergui, D. Juric
2014 arXiv   pre-print
We present a new solver for massively parallel simulations of fully three-dimensional multiphase flows.  ...  The code includes modules for flow interaction with immersed solid objects, contact line dynamics, species and thermal transport with phase change.  ...  ACKNOWLEDGEMENTS This work was supported by: (1) the Partnership for Advanced Computing in Europe (PRACE),  ... 
arXiv:1410.8568v1 fatcat:o5ear43lsvgndaux4e4tiiuhmu

Massively Parallel Computing of Turbulent Transport in Tokamaks [article]

Jeremy Kepner , Viktor Decyk
1996 arXiv   pre-print
The code has been parallelized for a variety of architecures (C90, CM-5, T3D) using a 1-D domain decomposition along the torroidal axis, for which the number of particles in each cell remains approximately  ...  Simulating the non-linear behaviour requires solving for the perturbations of distrbution function in five dimensions.  ...  Results When the simulations start with a very small initial perturbation, there are generally two identifiable phases of the run.  ... 
arXiv:physics/9611025v1 fatcat:yricgxqirrepbo4pb5l5or3y54

Computational molecular engineering as an emerging technology in process engineering [article]

Martin Horsch and Christoph Niethammer and Jadran Vrabec and Hans Hasse
2013 arXiv   pre-print
The present level of development of molecular force field methods is assessed from the point of view of simulation-based engineering, outlining the immediate perspective for further development and highlighting  ...  parallel high-performance computing will lead to particularly significant improvements.  ...  Only in recent years have sufficently accurate molecular models become available for a wide variety of fluids, and it is only now that, due to massive parallelization, molecular simulations of complex  ... 
arXiv:1305.4781v1 fatcat:cz3igcwegfdx7frwebr74dmzee

Disimpy: A massively parallel Monte Carlo simulator for generating diffusion-weighted MRI data in Python

Leevi Kerkelä, Fabio Nery, Matt Hall, Chris Clark
2020 Journal of Open Source Software  
Acknowledgements This work was funded by the National Institute for Health Research Great Ormond Street Hospital Biomedical Research Centre (NIHR GOSH BRC).  ...  Disimpy: A massively parallel Monte Carlo simulator for generating diffusion-weighted MRI data in Python. Journal of Open Source Software, 5(52), 2527. https://doi.org/10.21105/joss.02527  ...  The random walker steps are generated in a massively parallel fashion on individual threads of one-dimensional CUDA blocks, resulting in a performance gain of over an order of magnitude when compared to  ... 
doi:10.21105/joss.02527 fatcat:55q3qdgjyfe2fb7kuvbnaevjhm

A massively parallel particle-in-cell code for the simulation of field-emitter based electron sources

Arno E. Candel, Micha M. Dehler, Matthias Troyer
2006 Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment  
For the realistic simulation of electron sources using field emitter arrays, the sub-micron resolution required for the emitters leads to simulation models not suitable for current serial codes.  ...  For the computation of external fields, matching parallel field solvers are in development with the electrostatic one being completed.  ...  Over the last two years, a massively parallel highperformance 3D Maxwell PIC code has been implemented in C++ using the POOMA II framework for parallel computing on the Linux platform.  ... 
doi:10.1016/j.nima.2005.11.059 fatcat:kdhz4cevubchzlq35gxn4dmcgy

Visualization of numerical simulations of astrophysical and fusion plasmas with the SDvision code

B. Thooris, D. Pomarède
2011 Procedia Computer Science  
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.  ...  A dedicated software for visualizing the massive amounts of data produced by these simulation codes has been developed, the SDvision code, deployed in the framework of IDL Object Graphics.  ...  Acknowledgements The creation of SDvision is part of the COAST project and has been motivated by the different simulations performed by the COAST astrophysicists members: we would like to thank R.  ... 
doi:10.1016/j.procs.2011.04.055 fatcat:ziscc7svljgubgd526kdbiucoi

Modernizing the ATLAS simulation infrastructure

A Di Simone
2017 Journal of Physics, Conference Series  
Such a massive update of a legacy code base requires careful choices 9 about what pieces of code to completely rewrite and what to wrap or revise.  ...  The ATLAS Simulation infrastructure has been used to produce upwards of 5 50 billion proton-proton collision events for analyses ranging from detailed Standard Model 6 measurements to searches for exotic  ...  On the other hand, the hardware standards have 89 been moving very strongly towards massively parallel architectures, and most of our code-base 90 is just not ready for parallel execution.  ... 
doi:10.1088/1742-6596/898/4/042010 fatcat:t34smebnubcmjpm7g6pltf625y

Massively parallel simulation of flow and transport in variably saturated porous and fractured media [chapter]

Yu-Shu Wu, Keni Zhang, Karsten Pruess
2002 Developments in Water Science  
This paper describes a massively parallel simulation method and its application for modeling multiphase flow and multicomponent transport in porous and fractured reservoirs.  ...  The parallel-computing method has been implemented into the TOUGH2 code and its numerical performance is tested on a Cray T3E-900 and IBM SP.  ...  ACKNOWLEDGEMENTS The authors would like to thank Andre Unger and Dan Hawkes for their review of this paper.  ... 
doi:10.1016/s0167-5648(02)80074-0 fatcat:l54brh55pbagvfshalek4ntvsa

A Python extension for the massively parallel multiphysics simulation framework waLBerla

Martin Bauer, Florian Schornbaum, Christian Godenschwager, Matthias Markl, Daniela Anderl, Harald Köstler, Ulrich Rüde
2015 International Journal of Parallel, Emergent and Distributed Systems  
We present a Python extension to the massively parallel HPC simulation toolkit waLBerla. waLBerla is a framework for stencil based algorithms operating on block-structured grids, with the main application  ...  field being fluid simulations in complex geometries using the lattice Boltzmann method.  ...  Acknowledgments We are grateful to the Leibniz Rechenzentrum in Garching and the Jülich Supercomputing Center for providing computational resources.  ... 
doi:10.1080/17445760.2015.1118478 fatcat:v7l4u2pbjbbxfkq6y4bh5x3eia

Visualization of Large Scientific Datasets - Analysis of Numerical Simulation Data and Astronomical Surveys Catalogues

Bruno Thooris, Daniel Pomarède
2015 Proceedings of the 6th International Conference on Information Visualization Theory and Applications  
In the context of our project COAST (for Computational Astrophysics), a program of massively parallel numerical simulations in astrophysics involving astrophysicists and software engineers, we have developed  ...  visualization tools to analyse the massive amount of data produced in these simulations.  ...  ACKNOWLEDGEMENTS Authors are grateful to the astrophysicists of the COAST team and other physicists or astronomers for providing simulations or surveys data  ... 
doi:10.5220/0005300901170122 dblp:conf/grapp/ThoorisP15 fatcat:nos644ailjfbhpl3qxtbgqhkoi

Massively Parallel Phase-Field Simulations for Ternary Eutectic Directional Solidification [article]

Martin Bauer, Johannes Hötzer, Philipp Steinmetz, Marcus Jainta, Marco Berghoff, Florian Schornbaum, Christian Godenschwager, Harald Köstler, Britta Nestler, Ulrich Rüde
2015 arXiv   pre-print
For a realistic simulation, we use the well established thermodynamically consistent phase-field method and improve it with a new grand potential formulation to couple the concentration evolution.  ...  We significantly extend previous simulations that have used simpler phase-field models or were performed on smaller domain sizes.  ...  CONCLUSION In this work, we have developed and evaluated a massively parallel simulation code for a thermodynamic consistent phase-field model, based on the grand potential approach, which runs efficiently  ... 
arXiv:1506.01684v1 fatcat:equ5plm3qjdxdivlaqmqiveule

Simulating Plasma Turbulence in Tokamaks [article]

Jeremy Kepner, Viktor Decyk
1997 arXiv   pre-print
Simulating this highly non-linear behavior requires solving for the perturbations of the phase space distribution function in five dimensions.  ...  The code has been parallelized for a variety of architectures (C90, CM-5, T3D) using a 1-D domain decomposition along the toroidal axis, for which the number of particles in each cell remains approximately  ...  General Behavior When a simulation starts with a very small initial perturbation, the run generally has two identifiable phases.  ... 
arXiv:physics/9704011v1 fatcat:jt4z3sdstbcjtpfrc3wtca5dxq

Optimization of Mass Concrete Construction Using a Twofold Parallel Genetic Algorithm

Mariane Rita, Eduardo Fairbairn, Fernando Ribeiro, Henrique Andrade, Helio Barbosa
2018 Applied Sciences  
This model is implemented in a finite element code that is, in turn, parallelized.  ...  This paper presents a solution strategy, based on a parallel Genetic Algorithm (GA), to optimize the construction of massive concrete structures.  ...  The code allows for the simulation of a layered construction, i.e., the geometry of the structure may change to simulate the sequential pouring of the several concrete lifts.  ... 
doi:10.3390/app8030399 fatcat:oqzk2llgwjaxfomlwcahs5buju

An open source massively parallel solver for Richards equation: Mechanistic modelling of water fluxes at the watershed scale

L. Orgogozo, N. Renon, C. Soulaine, F. Hénon, S.K. Tomer, D. Labat, O.S. Pokrovsky, M. Sekhar, R. Ababou, M. Quintard
2014 Computer Physics Communications  
In this paper we present a massively parallel open source solver for Richards equation, named the RichardsFOAM solver.  ...  The source code for RichardsFOAM may be downloaded from the CPC program library website.It exhibits good parallel performances (up to ∼90 parallel efficiency with 1024 processors both in strong and weak  ...  , useful for turbulence) -cyclic (for cyclic simulations) -symmetryPlane (for symmetry plane) -empty (to specify that the simulation will be 2D or 1D) -wedge (for axi-symmetric simulations) -processor  ... 
doi:10.1016/j.cpc.2014.08.004 fatcat:skuhkrhbxbhxhimdzw56ckxcjm

Computational models of stellar collapse and core-collapse supernovae

Christian D Ott, Erik Schnetter, Adam Burrows, Eli Livne, Evan O'Connor, Frank Löffler
2009 Journal of Physics, Conference Series  
core-collapse supernovae and black hole formation on current and future massively-parallel HPC systems.  ...  We then go on to discuss the new code Zelmani which is based on the open-source HPC Cactus framework and provides a scalable AMR approach for 3D fully general-relativistic modeling of stellar collapse,  ...  It is now used to generally refer to the strong feedback in a complicated astrophysical situation which dampens the effect of a change in any single parameter [100, 101] .  ... 
doi:10.1088/1742-6596/180/1/012022 fatcat:d47dwmnvlzgyrnize6rbk5by24
« Previous Showing results 1 — 15 out of 58,694 results