Bypass transition and spot nucleation in boundary layers

Kreilos T, Khapko T, Schlatter P, Duguet Y, Henningson DS, Eckhardt B (2016)

Publication Type: Journal article

Publication year: 2016

Journal

Physical Review Fluids American Physical Society

Book Volume: 1

Article Number: 043602

Journal Issue: 4

DOI: 10.1103/PhysRevFluids.1.043602

Abstract

The spatiotemporal aspects of the transition to turbulence are considered in the case of a boundary-layer flow developing above a flat plate exposed to free-stream turbulence. Combining results on the receptivity to free-stream turbulence with the nonlinear concept of a transition threshold, a physically motivated model suggests a spatial distribution of spot nucleation events. To describe the evolution of turbulent spots a probabilistic cellular automaton is introduced, with all parameters directly obtained from numerical simulations of the boundary layer. The nucleation rates are then combined with the cellular automaton model, yielding excellent quantitative agreement with the statistical characteristics for different free-stream turbulence levels. We thus show how the recent theoretical progress on transitional wall-bounded flows can be extended to the much wider class of spatially developing boundary-layer flows.

Authors with CRIS profile

Philipp Schlatter

Involved external institutions

École Polytechnique Fédérale de Lausanne (EPFL)

Switzerland (CH) Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH)

Sweden (SE) École Polytechnique - Université Paris-Saclay

France (FR) Philipps-Universität Marburg

Germany (DE)

How to cite

APA:

Kreilos, T., Khapko, T., Schlatter, P., Duguet, Y., Henningson, D.S., & Eckhardt, B. (2016). Bypass transition and spot nucleation in boundary layers. Physical Review Fluids, 1(4). https://doi.org/10.1103/PhysRevFluids.1.043602

MLA:

Kreilos, Tobias, et al. "Bypass transition and spot nucleation in boundary layers." Physical Review Fluids 1.4 (2016).

BibTeX: Download