Reduction 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 decrease/suppress Vortex Induced Forces and Motion. Suppression is required when fluid-structure interaction becomes destructive as in VIM of flexible cylinders or rigid cylinders on elastic support, such as underwater pipelines, marine risers, tubes in heat exchangers, nuclear fuel rods, cooling towers, SPAR offshore platforms.
- Inventors:
- Issue Date:
- Research Org.:
- Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1129081
- Patent Number(s):
- 8684040
- Application Number:
- 12/125,409
- Assignee:
- The Regents of the University of Michigan (Ann Arbor, MI)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B63 - SHIPS OR OTHER WATERBORNE VESSELS B63B - SHIPS OR OTHER WATERBORNE VESSELS
F - MECHANICAL ENGINEERING F15 - FLUID-PRESSURE ACTUATORS F15D - FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- DOE Contract Number:
- FG36-05GO15162
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2008 May 22
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Bernitsas, Michael M, and Raghavan, Kamaldev. Reduction of vortex induced forces and motion through surface roughness control. United States: N. p., 2014.
Web.
Bernitsas, Michael M, & Raghavan, Kamaldev. Reduction of vortex induced forces and motion through surface roughness control. United States.
Bernitsas, Michael M, and Raghavan, Kamaldev. Tue .
"Reduction of vortex induced forces and motion through surface roughness control". United States. https://www.osti.gov/servlets/purl/1129081.
@article{osti_1129081,
title = {Reduction 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 decrease/suppress Vortex Induced Forces and Motion. Suppression is required when fluid-structure interaction becomes destructive as in VIM of flexible cylinders or rigid cylinders on elastic support, such as underwater pipelines, marine risers, tubes in heat exchangers, nuclear fuel rods, cooling towers, SPAR offshore platforms.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {4}
}
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Works referencing / citing this record:
Passive Control of Vortex-Induced Vibrations: An Overview
journal, January 2008
- Kumar, Raghavan; Sohn, Chan-Hyun; Gowda, Bangalore
- Recent Patents on Mechanical Engineeringe, Vol. 1, Issue 1