von Karman Vortex Street
A vorticity contour plot of a flow past an obstruction (Re = 120) that displays the phenomenon referred to as the von Karman vortex street (St = 0.16).
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Non-Newtonian Fluids
This is a combination of corn starch and water. The combination is a non-Newtonian fluid, which means that the viscosity can change under shear stress changes. This material, sometimes called Oobeck after a Dr. Seuss book, Bartholomew and the Oobleck , is an equal volume of dry, powdered corn starch and water (tap water is fine).