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Title: Enhancement of vortex induced forces and motion through surface roughness control

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).

Inventors:
 [1];  [2]
  1. Saline, MI
  2. Houston, TX
Issue Date:
Research Org.:
Vortex Hydro Energy, Inc., Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1033940
Patent Number(s):
8047232
Application Number:
12/277,321
Assignee:
The Regents of The University of Michigan (Ann Arbor, MI)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
F - MECHANICAL ENGINEERING F03 - MACHINES OR ENGINES FOR LIQUIDS F03B - MACHINES OR ENGINES FOR LIQUIDS
DOE Contract Number:  
FG36-05GO15162
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
13 HYDRO ENERGY

Citation Formats

Bernitsas, Michael M, and Raghavan, Kamaldev. Enhancement of vortex induced forces and motion through surface roughness control. United States: N. p., 2011. Web.
Bernitsas, Michael M, & Raghavan, Kamaldev. Enhancement of vortex induced forces and motion through surface roughness control. United States.
Bernitsas, Michael M, and Raghavan, Kamaldev. Tue . "Enhancement of vortex induced forces and motion through surface roughness control". United States. https://www.osti.gov/servlets/purl/1033940.
@article{osti_1033940,
title = {Enhancement of vortex induced forces and motion through surface roughness control},
author = {Bernitsas, Michael M and Raghavan, Kamaldev},
abstractNote = {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).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {11}
}

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Works referenced in this record:

Passive Control of Vortex-Induced Vibrations: An Overview
journal, January 2008