Title: Formation of longitudinal vortices on a concave surface Description: 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). *See http://www-fpc.stanford.edu/Durbin/wu/. Credits: Xiaohua Wu* and Paul A. Durbin
References:
[1] J. Jeong and F. Hussain, "On the identification of a vortex", Journal of Fluid Mechanics, 285, 69-94, 1995.
[2] X. Wu and P. A. Durbin, "Wake distortion in a turbine passage", Web Page: Contributed By: |