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The Oseen–Navier–Stokes flow in the exterior of a rotating obstacle: The non-autonomous case

  • Tobias Hansel EMAIL logo and Abdelaziz Rhandi
Published/Copyright: February 19, 2013

Abstract

Consider the incompressible Navier–Stokes flow past a rotating obstacle with a general time-dependent angular velocity and a time-dependent outflow condition at infinity – sometimes called an Oseen condition. By a suitable change of coordinates the problem is transformed to a non-autonomous problem with unbounded drift terms on a fixed exterior domain Ωd. It is shown that the solution to the linearized problem is governed by a strongly continuous evolution system {TΩ(t,s)}ts0 on Lσp(Ω) for 1<p<. Moreover, Lp-Lq smoothing properties and gradient estimates of TΩ(t,s), 0st, are obtained. These results are the key ingredients to show local in time existence of mild solutions to the full nonlinear problem for initial value in Lσp(Ω), pd.

Funding source: DFG International Research Training Group 1529 on Mathematical Fluid Dynamics at TU Darmstadt

The authors are grateful to the anonymous referee for valuable comments. The first author wishes to thank the University of Salerno for the support during his one week visit.

Received: 2010-6-14
Revised: 2012-9-21
Published Online: 2013-2-19
Published in Print: 2014-9-1

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