(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.


Figure 2


Fig. 2. Representation of the cross-section of a vortex in the wake of a bird engaged in WAIR including some of the variables measured in the wake vortices. Uind, induced velocity in the momentum jet; {alpha}h, impulse angle of wake vortex relative to horizontal; {alpha}s, impulse angle of wake vortex relative to substrate; ß, inclination angle of vortex; S, width of vortex.