Description: An overview of the Lattice Boltzmann Method will be provided and several cases spanning subsonic and transonic flow regimes will be presented. The cases will range in complexity from fundamental canonical to complex real-world geometry. The talk will emphasize turbulent flow physics and modeling as related to high-lift aerodynamics and airframe aeroacoustics, both of which are often challenged by shock boundary layer interaction, boundary layer physics or massively separated flows. Finally, an overview of future directions will be provided to facilitate discussion to ensure development is aligned with industry needs.
Presenter(s): Jim Kopriva & Mark Kerrigan - 3dS, Dassault Systemes
Location: Wright Brothers Institute (WBI) 5000 Springfield St, Dayton, OH
Date & Time: February 20, 2020, 1:00p - 3:30p ET
Distribution Statement C. Distribution a authorized to U.S. Government Agencies and their contractors, Administrative or Operational Use, 18 February 2020. Other requests for this document shall be referred to the High Performance Computing Modernization Office, 3909 Halls Ferry Road, Vicksburg, MS 39180.
Description: Fluid turbulence is characterized by strong coupling across a broad range of scales. Furthermore, besides the usual local cascades, such coupling may extend to interactions that are non-local in scale- space. As such the computational demands associated with explicitly resolving the full set of scales and their interactions, as in the Direct Numerical Simulation (DNS) of the Navier-Stokes equations, in most problems of practical interest are so high that reduced models are necessary. Reduced modeling of turbulence is commonly approached by (1) simulating only the largest turbulence scales of interest, as in Large Eddy Simulation (LES) or (2) modeling the evolution of particular turbulence processes via turbulence prognostics, as in the case of Reynolds-averaged models (RANS). Effective turbulence models in either paradigm require high-fidelity data for calibration, often leading to leading-order empirical corrections to mathematical models. This talk covers how explicitly shifting some modeling demands to advanced data-driven methodologies in RANS, LES and hybrid RANS/LES frameworks can help improve the state-of-the-art modeling of turbulence and mixing.
Presenter(s): Gavin Portwood, PhD / Los Alamos National Laboratory
Location: ERDC ITL Classroom 2, Vicksburg MS
Date & Time: February 12, 2020, 10:00a - 11:30a CT
Distribution Statement C. Distribution a authorized to U.S. Government Agencies and their contractors, Administrative or Operational Use, 12 February 2020. Other requests for this document shall be referred to the High Performance Computing Modernization Office, 3909 Halls Ferry Road, Vicksburg, MS 39180.
Description: SC'18 Workshop Paper & Presentation -- In this seminar, we shall introduce SIMD vectorization and impediments to automatic compiler vectorization. Code refactoring methods suitable for iterative multiphysics models (e.g., chemical kinetics, equation-of-state) will be demonstrated. Performance benchmarks from several HPC platforms (AVX2, KNL, AVX-512) will also be reported to demonstrate the potential speedup from these methods.
Presenter(s): Dr. Chris Stone, PETTT SAIC
Location: Webcast
Date & Time: February 5, 2019, 1:00p - 2:00p ET
Distribution Statement D. Distribution authorized to the Department of Defense and U.S. DoD contractors only, Administrative or Operational Use, 5 February 2019. Other requests for this document shall be referred to the High Performance Computing Modernization Office, 3909 Halls Ferry Road, Vicksburg, MS 39180.
Description: This workshop demonstrates the use of the TAU and Threadspotter analysis tools and provides a detailed performance characterization of the FUN3D CFD code. Detailed descriptions are provided of performant algorithm implementations of key FUN3D kernels on recently available CPUs, and on the latest Volta GPUs from Nvidia.
Presenters: Dr. Nicholas Chaimov, Paratools & Dr. Mohammad Zubair, ODU
Date/Location: May 22, 2018, Tec^Edge, Dayton, OH
Distribution Statement D. Distribution limited to the Department of Defense and U.S. DoD contractors only, for administrative or operational use, 22 May 2018. Other requests for this document shall be referred to the High Performance Computing Modernization Office, 3909 Halls Ferry Road, Vicksburg, MS 39180.
Description: This presentation summarizes the various modeling approaches for vibrational relaxation and its coupling to molecular dissociation, as well as the PETTT involvement in the AFRL hypersonics non-equilibrium chemistry modeling effort.
Presenter: Dr. Konstantinos Vogiatzis, Engility Corp.
Date: May 24, 2017
Distribution Statement D. Distribution limited to the Department of Defense and U.S. DoD contractors only, for administrative or operational use, 24 August 2017. Other requests for this document shall be referred to the High Performance Modernization Office, 10501 Furnace Road, Suite 101, Lorton, VA 22079.