Collections of Fluid Loaded Plates: A Nonlocal Approach

Details Collections of Fluid Loaded Plates: A Nonlocal Approach Collections of Fluid Loaded Plates: A Nonlocal Approach

2009-08-12

arxiv.org/abs/0908.1691v1

Mathematics

Analysis of PDEs

24 pages, 4 figures

Scientific paper

We consider the motion of a collection of fluid loaded elastic plates, situated horizontally in an infinitely long channel. We use a new, unified approach to boundary value problems, introduced by A.S. Fokas in the late 1990s, and show the problem is equivalent to a system of 1-parameter integral equations. We give a detailed study of the linear problem, providing explicit solutions and well-posedness results in terms of standard Sobolev spaces. We show that the associated Cauchy problem is completely determined by a matrix, which depends solely on the mean separation of the plates and the horizontal velocity of each of the driving fluids. This matrix corresponds to the infinitesimal generator of the semigroup for the evolution equations in Fourier space. By analysing the properties of this matrix, we classify necessary and sufficient conditions for which the problem is asymptotically stable.

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