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- W4385773077 abstract "This paper considers improving the Picard and Newton iterative solvers for the Navier–Stokes equations in the setting where data measurements or solution observations are available. We construct adapted iterations that use continuous data assimilation (CDA) style nudging to incorporate the known solution data into the solvers. For CDA-Picard, we prove the method has an improved convergence rate compared to usual Picard, and the rate improves as more measurement data is incorporated. We also prove that CDA-Picard is contractive for larger Reynolds numbers than usual Picard, and the more measurement data that is incorporated the larger the Reynolds number can be with CDA-Picard still being contractive. For CDA-Newton, we prove that the domain of convergence, with respect to both the initial guess and the Reynolds number, increases as the amount of measurement data is increased. Additionally, for both methods we show that CDA can be implemented as direct enforcement of measurement data into the solution. Numerical results for common benchmark Navier–Stokes tests illustrate the theory." @default.
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- W4385773077 date "2023-11-01" @default.
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- W4385773077 title "Accelerating and enabling convergence of nonlinear solvers for Navier–Stokes equations by continuous data assimilation" @default.
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- W4385773077 doi "https://doi.org/10.1016/j.cma.2023.116313" @default.
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