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- W2971111905 abstract "We develop a mathematically and physically sound definition of the spectrally-hyperviscous Navier-Stokes equations (SHNSE) on general bounded domains Omega with zero (no-slip) boundary conditions prescribed on varGamma=partialvarOmega. Previous successful studies of the SHNSE have been limited to periodic-box domains. There are significant theoretical obstacles to overcome in extending the SHNSE beyond this case. We solve them with the help of the Helmholtz decomposition, and with our new formulation of the SHNSE on general bounded domains in hand we then establish foundational results, beginning with the existence of globally regular solutions. Given that the SHNSE is meant to approximate the NSE for small mu or large m, we establish this rigorously in the general case by adapting the weak subsequence convergence results of [5] to hold here. On intervals [0,T] with a common H^{1}-bound we deepen this sense of approximation by obtaining strong convergence. First, by using estimates depending only on the common H^{1}-bound to maximize computational applicability we show that SHNSE solutions converge uniformly in H^{1} to the NSE solution as either murightarrow0 or mrightarrowinfty. Then in cases in which bootstrapped higher-order bounds can be readily used we show that higher-order convergence results hold. Our final results use the Stokes-pressure methodology developed in [29], [30] to recast the SHNSE in a form which like the NSE reformulation in [29], [30] is more adaptable to computation and the specification of boundary values for the pressure." @default.
- W2971111905 created "2019-09-05" @default.
- W2971111905 creator A5050079930 @default.
- W2971111905 date "2019-08-29" @default.
- W2971111905 modified "2023-09-27" @default.
- W2971111905 title "The 3-D Spectrally-Hyperviscous Navier-Stokes Equations on Bounded Domains with Zero Boundary Conditions" @default.
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