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Pitching airfoil

This picture is a side view of a lifting surface undergoing a pitching maneuver while being towed from right to left in a water tank. Pre-existing, horizontal dye layers are illuminated using a vertical sheet of laser light. The picture clearly depicts the time-dependent vortices forming as a result of the wing maneuver.

Contributed by Prof. M. Gad-el-Hak, University of Notre Dame.

The copyright on these images is held by the contributors. Permission must be sought before using them in any way.