A semi-implicit method for internal boundary layers in compressible flows Original Research Article

A semi-implicit boundary-layer method is developed for application to spatially evolving internal boundary layers in compressible fluids. The method circumvents convergence difficulties that may arise with fully implicit marching schemes whenever the mean streamwise velocity profile is inflectional. The method is demonstrated for the special case of the compressible, laminar axisymmetric jet. However, the properties of the scheme make it well suited also to laminar or turbulent free shear layers, wakes and planar jets.