Abstract
Starting with a pair of symmetric oblique waves on the linear neutral surface, highly nonlinear 3D time-periodic equilibrium solutions were computed numerically for plane Poiseuille (PPF) and Blasius boundary-layer flow (BLF) via Keller’s pseudo-arclength continuation procedure. For BLF the parallel-flow assumption was used. This investigation was aimed at locating possible nonlinear thresholds for linear transient-growth solutions in bypass transition. For low-truncation PPF subcritical solutions were discovered near the experimentally observed minimum transition Reynolds number. Contrary to this, practically no subcritical primary equilibria were found in BLF, and the turbulent friction factor was approached only above a certain supercritical Reynolds number.
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© 1994 Springer-Verlag, Berlin Heidelberg
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Koch, W. (1994). Strongly Nonlinear Oblique-Wave Solutions in Wall-Bounded Shear Flows. In: Lin, S.P., Phillips, W.R.C., Valentine, D.T. (eds) Nonlinear Instability of Nonparallel Flows. International Union of Theoretical and Applied Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-85084-4_9
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DOI: https://doi.org/10.1007/978-3-642-85084-4_9
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