Abstract
We study the existence and uniqueness of regular solutions to the Navier–Stokes initial-boundary value problem with non-decaying bounded initial data, in a smooth exterior domain of \({{\mathbb R}^n, n\ge3}\) . The pressure field, p, associated to these solutions may grow, for large |x|, as O(|x|γ), for some \({\gamma\in (0,1)}\) . Our class of existence is sharp for well posedeness, in that we show that uniqueness fails if p has a linear growth at infinity. We also provide a sufficient condition on the spatial growth of \({\nabla p}\) for the boundedness of v, at all times. Also this latter result is shown to be sharp.
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Galdi, G.P., Maremonti, P. & Zhou, Y. On the Navier–Stokes Problem in Exterior Domains with Non Decaying Initial Data. J. Math. Fluid Mech. 14, 633–652 (2012). https://doi.org/10.1007/s00021-011-0083-9
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DOI: https://doi.org/10.1007/s00021-011-0083-9