Real Analytic Local <scp>Well‐Posedness</scp> for the Triple Deck

DOI10.1002/CPA.21894zbMATH Open1476.35200arXiv1905.07640OpenAlexW3017239465MaRDI QIDQ5006432

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Publication date: 16 August 2021

Published in: (Search for Journal in Brave)

Abstract: The Triple Deck model is a classical high order boundary layer model that has been proposed to describe flow regimes where the Prandtl theory is expected to fail. At first sight the model appears to lose two derivatives through the pressure-displacement relation which links pressure to the tangential slip. In order to overcome this, we split the Triple Deck system into two coupled equations: a Prandtl type system on $mathbbH$ and a Benjamin-Ono type equation on $mathbbR$. This splitting enables us to extract a crucial leading order cancellation at the top of the lower deck. We develop a functional framework to subsequently extend this cancellation into the interior of the lower deck, which enables us to prove the local well-posedness of the model in tangentially real analytic spaces.

Full work available at URL: https://arxiv.org/abs/1905.07640

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