Near-Wall Coherent Structures: History, Identification and Detection - Transport and Coherent Structures in Wall Turbulence - page 186

Figure 3.28. a) Trajectories in the phase plane Q-R in homogeneous
turbulence with representing a large Reynolds number
and b) the trajectories in the buffer sublayer (

β = 100

y +

)

5.6 < < 41

at Re

θ =

300 b), according to [CHA 00]

3.10. “Lambda-2” criterion

The criterion proposed by Jeong and Hussain [JEO 95]
is essentially based on the criterion of minimum pressure at
the core of a vortex. Let us look again at the Hessian matrix

λ

2