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• W4317583774 abstract "Galerkin reduced-order models (ROMs) often struggle to accurately capture multiscale fluid physics in challenging flow regimes such as flows experiencing compressibility effects. This in part stems from the global nature of both the basis construction problem and the spectral formulation itself. In this work, a multibasis ROM is developed in an affine space based on proper orthogonal decomposition (POD) by projecting the full Navier-Stokes equations expressed in terms of the specific volume, velocity, and pressure primitive variables. The model is applied to high-fidelity numerical simulation datasets obtained for a canonical compressible flow configuration: the flow over a backward facing step at different subsonic Mach numbers. It is observed that application of an eigenvalue reassignment (ER) stabilization method [1, 2] is required to avoid early divergence of the ROM predictions for this configuration in the three Mach numbers tested. The sensitivity of the POD-ROM results to the choice of parameters in the stabilization algorithm is discussed." @default.
• W4317583774 created "2023-01-21" @default.
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• W4317583774 date "2023-01-19" @default.
• W4317583774 modified "2023-09-27" @default.
• W4317583774 title "Application of an Affine Nonlinear Galerkin Reduced-order Model to Compressible Fluid Flows" @default.
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• W4317583774 doi "https://doi.org/10.2514/6.2023-1377" @default.
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