Abstract
Bypass transition of a boundary layer takes place at high main stream turbulence levels, when main stream disturbances intrude directly into the viscous sublayer. This (non-linear) transition phenomenon is not yet understood. In this paper a numerical study is presented in which single coherent perturbations are introduced into a spatially developing laminar boundary layer. The (fully compressible) Navier-Stokes equations are solved using direct numerical simulation with a higher order finite difference method on a collocated grid. The results show that the initially smooth disturbance rapidly changes into an arrow-head structure with the characteristics of a turbulent spot.
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© 2001 Springer Science+Business Media Dordrecht
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de Lange, H.C., Bastiaans, R.J.M. (2001). Development of Coherent Perturbations in a Laminar Boundary Layer. In: Geurts, B.J., Friedrich, R., Métais, O. (eds) Direct and Large-Eddy Simulation IV. ERCOFTAC Series, vol 8. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-1263-7_32
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DOI: https://doi.org/10.1007/978-94-017-1263-7_32
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-5893-5
Online ISBN: 978-94-017-1263-7
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