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- W2329757194 abstract "A three-dimensional unstructured grid algorithm has been developed for the solution of the filtered Navier-Stokes equations. The algorithm is intended for Large Eddy Simulation (LES), and unsteady inviscid (Euler) or viscous (laminar Navier-Stokes) flow simulation. The filtered Navier-Stokes equations are solved on an unstructured grid of tetrahedral cells. Cell-averaged values are stored at the centroid of each cell, in a cell-centered storage scheme. Inviscid flux computations are performed by applying a Riemann solver across each face, the values at the points on the faces being obtained by function reconstruction from the cell-averaged values. The viscous fluxes and heat transfer are obtained by application of Gauss' theorem. The first objective of this paper is the evaluation of the accuracy of several different function reconstruction methods, namely, secondand thirdorder least squares schemes and the second-order Frink's method. Simulation of the propagation of a weak one-dimensional acoustic wave using the Euler equations is used to evaluate the reconstruction methods. The third-order methods are typically (but not always) found to be less dissipative than the second order least squares. The secondorder Frink's method is the most dissipative. The second objective of the paper is to perform a Large Eddy Simulation of the decay of incompressible isotropic turbulence using the Monotone Integrated Large Eddy Simulation (MILES) approach wherein the inherent dissipation of the 'Graduate Research Assistant, Member AIAA tProfessor, Associate Fellow AIAA Copyright ©1998 by Nora Okong'o and Doyle D. Knight. Published by the American Institute of Aeronautics and Astronautics, Inc. with permission. numerical algorithm acts as the model for the subgrid scale (SGS) stresses. The computed results compare favorably with experimental data." @default.
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- W2329757194 date "1998-01-12" @default.
- W2329757194 modified "2023-09-26" @default.
- W2329757194 title "Accurate three-dimensional unsteady flow simulation using unstructured grids" @default.
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- W2329757194 doi "https://doi.org/10.2514/6.1998-787" @default.
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