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An $$L^q$$-analysis of viscous fluid flow past a rotating obstacle. (English) Zbl 1136.76340
Summary: Consider the problem of time-periodic strong solutions of the Stokes and Navier-Stokes system modelling viscous incompressible fluid flow past or around a rotating obstacle in Euclidean three-space. Introducing a rotating coordinate system attached to the body, a linearization yields a system of partial differential equations of second order involving an angular derivative not subordinate to the Laplacian. In this paper we find an explicit solution for the linear whole space problem when the axis of rotation is parallel to the velocity of the fluid at infinity. For the analysis of this solution in $$L^q$$-spaces, $$1<q<\infty$$, we will use tools from harmonic analysis and a special maximal operator reflecting paths of fluid particles past or around the obstacle.

##### MSC:
 76D05 Navier-Stokes equations for incompressible viscous fluids 35C15 Integral representations of solutions to PDEs 35Q35 PDEs in connection with fluid mechanics 76D99 Incompressible viscous fluids 76U05 General theory of rotating fluids
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