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Overview of the NASA Glenn Flux Reconstruction Based High-Order Unstructured Grid CodeA computational fluid dynamics code based on the flux reconstruction (FR) method is currently being developed at NASA Glenn Research Center to ultimately provide a large- eddy simulation capability that is both accurate and efficient for complex aeropropulsion flows. The FR approach offers a simple and efficient method that is easy to implement and accurate to an arbitrary order on common grid cell geometries. The governing compressible Navier-Stokes equations are discretized in time using various explicit Runge-Kutta schemes, with the default being the 3-stage/3rd-order strong stability preserving scheme. The code is written in modern Fortran (i.e., Fortran 2008) and parallelization is attained through MPI for execution on distributed-memory high-performance computing systems. An h- refinement study of the isentropic Euler vortex problem is able to empirically demonstrate the capability of the FR method to achieve super-accuracy for inviscid flows. Additionally, the code is applied to the Taylor-Green vortex problem, performing numerous implicit large-eddy simulations across a range of grid resolutions and solution orders. The solution found by a pseudo-spectral code is commonly used as a reference solution to this problem, and the FR code is able to reproduce this solution using approximately the same grid resolution. Finally, an examination of the code's performance demonstrates good parallel scaling, as well as an implementation of the FR method with a computational cost/degree- of-freedom/time-step that is essentially independent of the solution order of accuracy for structured geometries.
Document ID
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Spiegel, Seth C.
(Oak Ridge Associated Universities, Inc. TN, United States)
DeBonis, James R.
(NASA Glenn Research Center Cleveland, OH United States)
Huynh, H. T.
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
August 5, 2016
Publication Date
January 4, 2016
Subject Category
Mathematical And Computer Sciences (General)
Fluid Mechanics And Thermodynamics
Report/Patent Number
Meeting Information
Meeting: AIAA Aerospace Sciences Meeting (SciTech)
Location: San Diego, CA
Country: United States
Start Date: January 4, 2016
End Date: January 8, 2016
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 109492.
Distribution Limits
Public Use Permitted.
High-Order Methods
Flux Reconstruction
Discontinuous Galerkin
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