The mixing transition in turbulent flows
2000; Cambridge University Press; Volume: 409; Linguagem: Inglês
10.1017/s0022112099007946
ISSN1469-7645
Autores Tópico(s)Wind and Air Flow Studies
ResumoData on turbulent mixing and other turbulent-flow phenomena suggest that a (mixing) transition, originally documented to occur in shear layers, also occurs in jets, as well as in other flows and may be regarded as a universal phenomenon of turbulence. The resulting fully-developed turbulent flow requires an outer-scale Reynolds number of Re = U δ/ v [gsim ] 1–2 × 10 4 , or a Taylor Reynolds number of Re T = u ′ λ T / v [gsim ] 100–140, to be sustained. A proposal based on the relative magnitude of dimensional spatial scales is offered to explain this behaviour.
Referência(s)