Abstract
AbstractThe 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 that 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 ℍ and a Benjamin‐Ono‐type equation on ℝ. 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. © 2019 Wiley Periodicals, Inc.
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