A task-based parallel framework for ensemble simulations of rocket ignition

ORAL

Abstract

We present an integrated, parallel computational framework for exascale-oriented ensemble simulations of laser-induced ignition in a methane-oxygen rocket combustor. The framework employs the reacting flow solver HTR (Di Renzo et al., Comp. Phys. Comm. 2020). The solver uses the task-based programming model built on the Legion runtime system to achieve scalable simulation on supercomputers with heterogeneous architectures. The compressible, multi-species Navier-Stokes equations with finite-rate combustion chemistry are discretized on curvilinear grids using a low-dissipation conservative formulation. Laser-induced ignition is modeled by rapid, intense energy-deposition. This solver is integrated in a continuous development environment to manage a large software development team. The framework also leverages Legion’s mapper to efficiently perform the execution of ensembles simultaneously on GPUs and CPUs across multiple fidelities to carry out reliability and uncertainty quantification studies. We show verification examples as well as demonstrate the framework through combustor simulations using representative parameters.

*This work is supported by the Department of Energy, National Nuclear Security Administration under Award Number DE-NA0003968 (PSAAP III).

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Presenters

  • Kazuki Maeda

    • Stanford University
    • Center for Turbulence Research, Stanford University, USA

Authors

  • Kazuki Maeda

    • Stanford University
    • Center for Turbulence Research, Stanford University, USA

  • Mario Di Renzo

    • CERFACS
    • Cerfacs
    • Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique (CERFACS), France
    • Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique, France

  • Thiago Teixeira

    • Stanford University
    • Department of Computer Science, Stanford University, USA

  • Jonathan M Wang

    • Center for Turbulence Research, Stanford University, USA

  • Jeffrey M Hokanson

    • Smead Aerospace Engineering Sciences, University of Colorado Boulder, USA

  • Caetano Melone

    • Mechanical Engineering Department, Stanford University, USA

  • Steve Jones

    • Mechanical Engineering Department, Stanford University, USA

  • Javier Urzay

    • Center for Turbulence Research, Stanford University, USA
    • Center for Turbulence Research, Stanford University
    • Stanford Univ

  • Gianluca Iaccarino

    • Stanford University
    • Department of Mechanical Engineering, Stanford University
    • Mechanical Engineering Department, Stanford University, USA