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Additional recommended knowledge
In fluid dynamics, a wake is the region of turbulence around a solid body moving relative to the water, caused by the flow of liquid around the body. The wake leading the body is caused by the compression of the liquid medium by the moving body, and is often called a bow wake when observed preceding a watercraft. As with all wave forms, it spreads outward from the source until its energy is overcome or lost, usually by friction or dispersion.
The angle of the wake of a body moving steady in a deep fluid is 2arcsin(1/3)  (approximately 39 degrees).
Wakes are occasionally used recreationally. Swimmers, people riding personal watercraft, and aquatic mammals such as dolphins, can ride the leading edge of a wake. In the sport of water polo, the ball carrier can swim while advancing the ball, propelled ahead with the wake created by alternating armstrokes, a technique known as dribbling.
At closer spacing, there are three types of flow:
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Wake". A list of authors is available in Wikipedia.|