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- W2892556960 abstract "For reduced order models (ROMs) of fluid flows, we investigate theoretically and computationally whether differentiation and ROM spatial filtering commute, i.e., whether the commutation error (CE) is nonzero. We study the CE for the Laplacian and two ROM filters: the ROM projection and the ROM differential filter. Furthermore, when the CE is nonzero, we investigate whether it has any significant effect on ROMs that are constructed by using spatial filtering. As numerical tests, we use the Burgers equation with viscosities $nu=10^{-1}$ and $nu=10^{-3}$ and a 2D flow past a circular cylinder at Reynolds numbers $Re=1$ and $Re=100$. Our investigation shows that: (i) the CE exists, and (ii) the CE has a significant effect on ROM development for low Reynolds numbers, but not so much for higher Reynolds numbers." @default.
- W2892556960 created "2018-10-05" @default.
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- W2892556960 date "2018-10-01" @default.
- W2892556960 modified "2023-09-27" @default.
- W2892556960 title "Commutation Error in Reduced Order Modeling of Fluid Flows" @default.
- W2892556960 hasPublicationYear "2018" @default.
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