Enhancement of vortex induced forces and motion through...

Details Enhancement of vortex induced forces and motion through... Enhancement of vortex induced forces and motion through...

2008-11-25

2011-11-01

Schneider, Craig (Department: 3753)

Fluid handling

Flow affected by fluid contact, energy field or coanda effect

Means to cause rotational flow of fluid

C290S053000, C416S006000

Reexamination Certificate

active

08047232

ABSTRACT:
Roughness is added to the surface of a bluff body in a relative motion with respect to a fluid. The amount, size, and distribution of roughness on the body surface is controlled passively or actively to modify the flow around the body and subsequently the Vortex Induced Forces and Motion (VIFM). The added roughness, when designed and implemented appropriately, affects in a predetermined way the boundary layer, the separation of the boundary layer, the level of turbulence, the wake, the drag and lift forces, and consequently the Vortex Induced Motion (VIM), and the fluid-structure interaction. The goal of surface roughness control is to increase Vortex Induced Forces and Motion. Enhancement is needed in such applications as harnessing of clean and renewable energy from ocean/river currents using the ocean energy converter VIVACE (Vortex Induced Vibration for Aquatic Clean Energy).

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Kumar, Raghavan A., Sohn, Chan-Hyun and Gowda, Bangalore H.L., “Passive Control of Vortex-Induced Vibrations: An Overview,” Recent Patents on Mechanical Engineering, 2008, vol. 1, No. 1, pp. 1-11.

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