| Popis: |
Morkovin (Transition to turbulence, ASME FED Publication, USA, vol 114, pp 1–12, 1991, [33]) classified transition to turbulence in to two main types: (i) The classical primary instability route whose onset is marked along with the presence of TS waves (as in ZPGBL) and (ii) the bypass routes, which encompass all other possible transition scenarios that do not exhibit TS waves. Unfortunately, this is too simplistic a classification scheme for the reasons given in the introduction. Moreover, the central theme of this chapter, is to show some typical bypass transition events shown experimentally and the corresponding theoretical explanations of these events. Of special interest is the development of two nonlinear theories of receptivity, derived from Navier–Stokes equation, without making any assumptions. |
