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Well-Posedness of a Nonlinear Shallow Water Model for an Oscillating Water Column with Time-Dependent Air Pressure.

Authors :
Bocchi, Edoardo
He, Jiao
Vergara-Hermosilla, Gastón
Source :
Journal of Nonlinear Science. Dec2023, Vol. 33 Issue 6, p1-42. 42p.
Publication Year :
2023

Abstract

We propose in this paper a new nonlinear mathematical model of an oscillating water column (OWC). The one-dimensional shallow water equations in the presence of this device are reformulated as a transmission problem related to the interaction between waves and a fixed partially immersed structure. By imposing the conservation of the total fluid-OWC energy in the non-damped scenario, we are able to derive a transmission condition that involves a time-dependent air pressure inside the chamber of the device, instead of a constant atmospheric pressure as in Bocchi et al. (ESAIM Proc Surv 70:68–83, 2021). We then show that the transmission problem can be reduced to a quasilinear hyperbolic initial boundary value problem with a semi-linear boundary condition determined by an ODE depending on the trace of the solution to the PDE at the boundary. Local well-posedness for general problems of this type is established via an iterative scheme by using linear estimates for the PDE and nonlinear estimates for the ODE. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09388974
Volume :
33
Issue :
6
Database :
Academic Search Index
Journal :
Journal of Nonlinear Science
Publication Type :
Academic Journal
Accession number :
172036550
Full Text :
https://doi.org/10.1007/s00332-023-09964-4