VORTEXVINES.COM

Vortex-Induced Vibration (VIV) can occur any time a long slender structure is exposed to a flowing fluid. Examples of structures subject to VIV include chimney stacks, cables, and car antennas that experience wind. VIV also commonly occurs in the ocean on pipelines, marine risers, tendons, jumpers, and umbilicals... VIV is caused by vortex shedding. As a fluid flows past a structure, eddies known as vortices are formed on the structure's surface and quickly convected downstream. It can be easily observed by immersing a stick or other structure in a flowing stream and examining the swirling vortices that travel in the wake of the stick... As the vortices form, they generate a low pressure region on the structure's surface. Once a vortex forms on one side of the structure, it grows until it interacts with fluid flowing around the opposite side of the structure which causes the vortex to separate and convect downstream. The process is then repeated on the opposite side of the structure,..