Transient dynamics simulations: Parallel algorithms for contact detection and smoothed particle hydrodynamics

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Transient dynamics simulations are commonly used to model phenomena such as car crashes, underwater explosions, and the response of shipping containers to high-speed impacts. Physical objects in such a simulation are typically represented by Lagrangian meshes because the meshes can move and deform with the objects as they undergo stress. Fluids (gasoline, water) or fluid-like materials (earth) in the simulation can be modeled using the techniques of smoothed particle hydrodynamics. Implementing a hybrid mesh/particle model on a massively parallel computer poses several difficult challenges. One challenge is to simultaneously parallelize and load-balance both the mesh and particle portions of the ... continued below

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19 p.

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Hendrickson, B.; Plimpton, S.; Attaway, S. & Swegle, J. September 1, 1996.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Transient dynamics simulations are commonly used to model phenomena such as car crashes, underwater explosions, and the response of shipping containers to high-speed impacts. Physical objects in such a simulation are typically represented by Lagrangian meshes because the meshes can move and deform with the objects as they undergo stress. Fluids (gasoline, water) or fluid-like materials (earth) in the simulation can be modeled using the techniques of smoothed particle hydrodynamics. Implementing a hybrid mesh/particle model on a massively parallel computer poses several difficult challenges. One challenge is to simultaneously parallelize and load-balance both the mesh and particle portions of the computation. A second challenge is to efficiently detect the contacts that occur within the deforming mesh and between mesh elements and particles as the simulation proceeds. These contacts impart forces to the mesh elements and particles which must be computed at each timestep to accurately capture the physics of interest. In this paper we describe new parallel algorithms for smoothed particle hydrodynamics and contact detection which turn out to have several key features in common. Additionally, we describe how to join the new algorithms with traditional parallel finite element techniques to create an integrated particle/mesh transient dynamics simulation. Our approach to this problem differs from previous work in that we use three different parallel decompositions, a static one for the finite element analysis and dynamic ones for particles and for contact detection. We have implemented our ideas in a parallel version of the transient dynamics code PRONTO-3D and present results for the code running on a large Intel Paragon.

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19 p.

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OSTI as DE96010971

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  • Supercomputing `96, Pittsburgh, PA (United States), 18-22 Nov 1996

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  • Other: DE96010971
  • Report No.: SAND--96-1285C
  • Report No.: CONF-961104--2
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 385550
  • Archival Resource Key: ark:/67531/metadc675901

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  • September 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • April 14, 2016, 1:53 p.m.

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Hendrickson, B.; Plimpton, S.; Attaway, S. & Swegle, J. Transient dynamics simulations: Parallel algorithms for contact detection and smoothed particle hydrodynamics, article, September 1, 1996; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc675901/: accessed June 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.