Dancer's Skirt - The Coreolos Effect

The coreolos effect is a name for the deflect tion of the motion of free flowing materials on a rotating surface. The authors actually came up with equations to describe these effects in infree flowing conical materials like the fabric of a skirt. They found that this flow and the associated coreolis forces plays a crucial role in forming the dervish like patterns. And apparently, when a sufi dancer twirls, the rotation of the skirt also gives rise to coreolis forces in the patterns of the fabric.