Initial-value problems for spot disturbances in incompressible or compressible boundary layers (Q1189842)

As a starting point to guide possible nonlinear studies, we concentrate in particular relatively long-scale inviscid spot disturbances in the context of the unsteady Euler equations, although short-scale with respect to Tollmien-Schlichting lengths for example. Both the incompressible and the compressible ranges are examined, for small disturbances, with the corresponding initial-value problems being treated computationally and analytically.