期刊
PHYSICAL REVIEW LETTERS
卷 110, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.204502
关键词
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资金
- Max Planck Society
- European Research Council under the European Union [306589]
- Deutsche Forschungsgemeinschaft (DFG) [SFB 963/1, A8]
- JUROPA in Julich Supercomputing Center [HGU17]
- European Research Council (ERC) [306589] Funding Source: European Research Council (ERC)
Laminar-turbulent intermittency is intrinsic to the transitional regime of a wide range of fluid flows including pipe, channel, boundary layer, and Couette flow. In the latter turbulent spots can grow and form continuous stripes, yet in the stripe-normal direction they remain interspersed by laminar fluid. We carry out direct numerical simulations in a long narrow domain and observe that individual turbulent stripes are transient. In agreement with recent observations in pipe flow, we find that turbulence becomes sustained at a distinct critical point once the spatial proliferation outweighs the inherent decaying process. By resolving the asymptotic size distributions close to criticality we can for the first time demonstrate scale invariance at the onset of turbulence.
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