Abstract
In this paper, we prove the L∞ ∩ L2 stability of Prandtl expansions of the shear flow type as \((U(y/\sqrt \nu ),0)\) for the initial perturbation in the Gevrey class, where U(y) is a monotone and concave function and ν is the viscosity coefficient. To this end, we develop the direct resolvent estimate method for the linearized Orr-Sommerfeld operator instead of the Rayleigh-Airy iteration method. Our method could be applied to the other relevant problems of hydrodynamic stability.
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Chen, Q., Wu, D. & Zhang, Z. On the L∞ stability of Prandtl expansions in the Gevrey class. Sci. China Math. 65, 2521–2562 (2022). https://doi.org/10.1007/s11425-021-1896-5
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DOI: https://doi.org/10.1007/s11425-021-1896-5