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• W2992095665 endingPage "1646" @default.
• W2992095665 startingPage "1629" @default.
• W2992095665 abstract "SUMMARY Model order reduction approaches, such as proper orthogonal decomposition (POD)‐Galerkin projection, provide a systematic manner to construct Reduced‐Order Models (ROM) from pregenerated high‐fidelity datasets. The current study focuses on the stabilization of ROMs built from high‐fidelity simulation data of a supersonic flow passing a circular cylinder, which features strong interactions between shockwaves and vortices. As shown in previous literatures and the current study, an implicit subspace correction (ISC) method is efficient in the stabilization of similar problems, but its accuracy is not consistent when applied on different ROMs; on the other hand, an eigenvalue reassignment (ER) method delivers superb accuracy when the mode number is small, but becomes too expensive and less robust as the number increases. A Hybrid method is proposed here to balance the computational cost while improving the overall robustness/accuracy in ROM stabilization. The Hybrid method first handles the majority of the modes using the ISC method and then applies the ER method to fine tune a smaller number of modes under a constraint for accuracy. Furthermore, when the typical L2 inner product is changed to a symmetry inner product in both POD computation and Galerkin projection, the performance of the stabilized ROMs is substantially improved for all methods." @default.
• W2992095665 created "2019-12-13" @default.
• W2992095665 creator A5021259854 @default.
• W2992095665 creator A5041729214 @default.
• W2992095665 date "2019-12-16" @default.
• W2992095665 modified "2023-10-14" @default.
• W2992095665 title "A hybrid stabilization approach for reduced‐order models of compressible flows with shock‐vortex interaction" @default.
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• W2992095665 doi "https://doi.org/10.1002/nme.6281" @default.
• W2992095665 hasPublicationYear "2019" @default.
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