Jacobs, R. G.; Durbin, P. A. Simulations of bypass transition. (English) Zbl 0983.76027 J. Fluid Mech. 428, 185-212 (2001). From the summary: We simulate numerically the bypass transition in an initially laminar boundary layer beneath free-stream turbulence. Transition precursors consist of long backward jets contained in the fluctuating \(u\)-velocity field; they flow backwards relative to the local mean velocity. The jets extend into the upper portion of the boundary layer, where they interact with free-stream eddies. In some locations a free-stream perturbation to the jet shear layer develops into a patch of irregular motion – a sort of turbulent spot. The spot spreads longitudinally and laterally, and ultimately merges into the down-stream turbulent boundary layer. Merging spots maintain the upstream edge of the turbulent region. The jets, themselves, are produced by low-frequency components of the free-stream turbulence that penetrate into the laminar boundary layer. Backward jets are component of laminar region streaks. We also describe a method to construct turbulent inflow from Orr-Sommerfeld continuous modes. Cited in 1 ReviewCited in 103 Documents MSC: 76F06 Transition to turbulence 76D10 Boundary-layer theory, separation and reattachment, higher-order effects 76M20 Finite difference methods applied to problems in fluid mechanics 76M22 Spectral methods applied to problems in fluid mechanics Keywords:bypass transition; laminar boundary layer; free-stream turbulence; jets; free-stream perturbation; turbulent spot; Orr-Sommerfeld continuous modes PDFBibTeX XMLCite \textit{R. G. Jacobs} and \textit{P. A. Durbin}, J. Fluid Mech. 428, 185--212 (2001; Zbl 0983.76027) Full Text: DOI