This image shows longitudinal vortices developed from passing wakes near the
pressure surface of a turbine cascade. These newly discovered vortices are neither
produced, nor sustained by the usual Gortler instability; rather, they are a consequence
of severely straining the passing wakes. The visualization was derived from a numerical
simulation, and used the vortex identification method of Jeong and Hussain. For further
details, see Wu and Durbin (2001a,b)
References:
[1] J. Jeong and F. Hussain, "On the identification of a vortex", Journal of
Fluid Mechanics, Vol. 285, 69-94, 1995.
[2] X. Wu and P.A. Durbin, "Wake distortion in a turbine passage",
Physics of Fluids, Vol. 13, pp. S9, 2001a, special edition featuring winning entries from
the 18th Annual Picture Gallery of Fluid Motion exhibit.
[3] X. Wu and P.A. Durbin, "Evidence of longitudinal vortices evolved
from distorted wakes in a turbine passage", Journal of Fluid Mechanics, Vol.446, pp.
199-228, 2001b.
Contributor: Xiaohua Wu and Paul A. Durbin.
See http://www-fpc.stanford.edu/Durbin/wu/.
