Developing extensible lattice-Boltzmann simulators for general-purpose graphics-processing units

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Lattice-Boltzmann methods are versatile numerical modeling techniques capable of reproducing a wide variety of fluid-mechanical behavior. These methods are well suited to parallel implementation, particularly on the single-instruction multiple data (SIMD) parallel processing environments found in computer graphics processing units (GPUs). Although more recent programming tools dramatically improve the ease with which GPU programs can be written, the programming environment still lacks the flexibility available to more traditional CPU programs. In particular, it may be difficult to develop modular and extensible programs that require variable on-device functionality with current GPU architectures. This paper describes a process of automatic code generation ... continued below

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14 p. (0.2 MB)

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Walsh, S C & Saar, M O December 21, 2011.

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Lattice-Boltzmann methods are versatile numerical modeling techniques capable of reproducing a wide variety of fluid-mechanical behavior. These methods are well suited to parallel implementation, particularly on the single-instruction multiple data (SIMD) parallel processing environments found in computer graphics processing units (GPUs). Although more recent programming tools dramatically improve the ease with which GPU programs can be written, the programming environment still lacks the flexibility available to more traditional CPU programs. In particular, it may be difficult to develop modular and extensible programs that require variable on-device functionality with current GPU architectures. This paper describes a process of automatic code generation that overcomes these difficulties for lattice-Boltzmann simulations. It details the development of GPU-based modules for an extensible lattice-Boltzmann simulation package - LBHydra. The performance of the automatically generated code is compared to equivalent purpose written codes for both single-phase, multiple-phase, and multiple-component flows. The flexibility of the new method is demonstrated by simulating a rising, dissolving droplet in a porous medium with user generated lattice-Boltzmann models and subroutines.

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14 p. (0.2 MB)

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PDF-file: 14 pages; size: 0.2 Mbytes

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  • Presented at: 20th International Conference on Discrete Simulation of Fluid Dynamics, Fargo, North Dakota, USA, ND, United States, Aug 08 - Aug 12, 2011

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  • Report No.: LLNL-CONF-521460
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1034506
  • Archival Resource Key: ark:/67531/metadc837996

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  • December 21, 2011

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  • May 19, 2016, 3:16 p.m.

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  • April 13, 2017, 5:55 p.m.

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Walsh, S C & Saar, M O. Developing extensible lattice-Boltzmann simulators for general-purpose graphics-processing units, article, December 21, 2011; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc837996/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.