Abstract
In this work, we are interested in a detailed qualitative analysis of the Kawahara equation, which models numerous physical phenomena such as magneto-acoustic waves in a cold plasma and gravity waves on the surface of a heavy liquid. First, we design a feedback control law, which combines a damping component and another one of finite memory type. Then, we are capable of proving that the problem is well-posed under a condition involving the feedback gains of the boundary control and the memory kernel. Afterward, it is shown that the energy associated with this system exponentially decays by employing two different methods: the first one utilises the Lyapunov function and the second one uses a compactness–uniqueness argument which reduces the problem to prove an observability inequality.
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\(\Vert \omega \Vert ^2\le \dfrac{\ell ^2}{\pi ^2}\Vert \partial _x \omega \Vert ^2\), for \(\omega \in H_0^2(\Omega ),\)
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Acknowledgements
The authors are grateful to the two anonymous reviewers for their constructive comments and valuable remarks. This work is part of the Ph.D. thesis of de Jesus at the Department of Mathematics of the Federal University of Pernambuco. Part of this work was done during the stay of the first author at Virginia Tech. He thanks the departments for their hospitality.
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RdeAC-F, BC and IMdeJ work equality in Conceptualization; formal analysis; investigation; writing—original draft; writing—review and editing.
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Capistrano--Filho was supported by CNPq grants numbers 307808/2021-1, 401003/2022-1, and 200386/2022-0, CAPES grants numbers 88881.311964/2018-01 and 88881.520205/2020-01, and MATHAMSUD 21-MATH-03.
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de A. Capistrano-Filho, R., Chentouf, B. & de Jesus, I.M. Dynamic Stability of the Kawahara Equation Under the Effect of a Boundary Finite Memory. Qual. Theory Dyn. Syst. 23, 28 (2024). https://doi.org/10.1007/s12346-023-00884-y
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DOI: https://doi.org/10.1007/s12346-023-00884-y