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Keywords: vortices
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Journal Articles
Article Type: Cfd And Viv
J. Offshore Mech. Arct. Eng. August 2012, 134(3): 031802.
Published Online: February 2, 2012
... reasonably accurate estimates of the fatigue damage rate over the entire riser length. condition monitoring fatigue offshore installations sensor placement structural engineering vibrations vortices 02 01 2011 13 09 2011 02 02 2012 02 02 2012 2012 American Society...
Journal Articles
Article Type: Offshore Technology
J. Offshore Mech. Arct. Eng. August 2012, 134(3): 031301.
Published Online: February 1, 2012
...-phase flow vortices 10 11 2010 29 06 2011 01 02 2012 01 02 2012 2012 American Society of Mechanical Engineers ...
Journal Articles
Article Type: Cfd And Viv
J. Offshore Mech. Arct. Eng. May 2012, 134(2): 021803.
Published Online: December 5, 2011
... on Ocean Engineering), World Scientific , Singapore , Vol. 17 . 25 01 2010 27 05 2011 05 12 2011 05 12 2011 boundary layer turbulence external flows flow instability hydrodynamics Navier-Stokes equations pipelines vortices numerical models circular marine...
Journal Articles
Article Type: Cfd And Viv
J. Offshore Mech. Arct. Eng. May 2012, 134(2): 021801.
Published Online: December 2, 2011
... absorbers structural engineering turbulence vibration control vortices wakes The present work investigates the hysteresis effect on the vortex induced vibration (VIV) of a circular cylinder that is restricted to move in the in-line direction and free to vibrate in the transverse direction...
Journal Articles
Article Type: Technical Briefs
J. Offshore Mech. Arct. Eng. February 2012, 134(1): 014501.
Published Online: October 13, 2011
... ) 01 04 2010 06 12 2010 13 10 2011 13 10 2011 damping design engineering offshore installations vortices water waves vortext-induced motion (VIM) monocolumn platform spar platform model test In general terms, the VIM phenomenon represents a type of fluid...
Journal Articles
Article Type: Ocean Engineering
J. Offshore Mech. Arct. Eng. February 2012, 134(1): 011101.
Published Online: October 12, 2011
... a force free condition on the wake ( 8 ). 12 03 2010 02 11 2010 12 10 2011 12 10 2011 blades shapes (structures) tidal power stations turbines vortices tidal/ocean current turbines vortex-lattice method (VLM) lifting line theory optimum loading on turbines...
Journal Articles
Article Type: Offshore Technology
J. Offshore Mech. Arct. Eng. February 2012, 134(1): 011301.
Published Online: October 12, 2011
... to high V r n ≅ 12 values. This V r n ≅ 12 value had not been obtained in NMRI-2007 tests. 11 12 2009 10 12 2010 12 10 2011 12 10 2011 design engineering offshore installations petroleum industry vortices vortex-induced motion (VIM...
Journal Articles
Article Type: Offshore Technology
J. Offshore Mech. Arct. Eng. November 2011, 133(4): 041304.
Published Online: April 8, 2011
...J. Baltazar; J. A. C. Falcão de Campos A low order potential based panel code is used to analyze the flow around the blades of a horizontal axis marine current turbine. An empirical vortex model is assumed for the turbine wake, which includes the variation of pitch of the helicoidal vortices...
Journal Articles
Article Type: Ocean Engineering
J. Offshore Mech. Arct. Eng. November 2011, 133(4): 041102.
Published Online: April 7, 2011
...) surface roughness vibrations vortices Marine risers are essential for the offshore petroleum industry. Risers are used for the drilling of subsea wells, for well intervention, and also for the flow of well fluids to production facilities at the sea surface. Furthermore, export risers take...
Journal Articles
Article Type: Ocean Engineering
J. Offshore Mech. Arct. Eng. August 2011, 133(3): 031106.
Published Online: March 31, 2011
... at different angular positions depending on the turbulence of the flow (characterized by Reynolds number). Vortices are shed alternatively from the two shear layers on both sides of the cylinder, with associated changes in the pressure distributions around the cylinder surface. The shedding of vortices (a Von...
Journal Articles
Article Type: Ocean Engineering
J. Offshore Mech. Arct. Eng. November 2010, 132(4): 041102.
Published Online: September 24, 2010
... it moves around the hull with the increasing velocities and, when in reaches 60 deg from the bow of the platform, the separation point is fixed in both fairleads. Therefore, for V r n > 11 , vortices are shed prematurely and the vortex street is less uniform and correlated causing...
Journal Articles
Article Type: Ocean Engineering
J. Offshore Mech. Arct. Eng. August 2010, 132(3): 031102.
Published Online: April 7, 2010
.... The differences between the results of the two different numerical methods are within 7% of the value generated using the conformal mapping method. Additionally, as the free-surface effect is avoided in both numerical methods, we can also compare the development of the downstream vortices. The geometries...
Journal Articles
Article Type: Offshore And Structural Mechanics
J. Offshore Mech. Arct. Eng. August 2010, 132(3): 031302.
Published Online: March 17, 2010
... equations shear turbulence vibrations vortices The recent high oil prices and the prevailing unstable situation in the Middle East gives the offshore industry in the U.S. a more important and challenging status. Since the U.S. domestic offshore industry has a seemingly prosperous future...
Journal Articles
Article Type: Ocean Engineering
J. Offshore Mech. Arct. Eng. August 2010, 132(3): 031101.
Published Online: March 17, 2010
... beam motion equation with external force obtained by integrating viscous and pressure loads on the riser surface. Then the critical parameters including riser VIV amplitude (a) to the riser outer diameter (D) ratio (a/D), vorticity contours, and motion trajectories were processed. The same parameters...
Journal Articles
Article Type: Offshore And Structural Mechanics
J. Offshore Mech. Arct. Eng. February 2010, 132(1): 011303.
Published Online: December 22, 2009
... 2009 22 12 2009 damping hydrodynamics numerical analysis offshore installations ships vortices Floating production, storage and offloading vessels (FPSOs) are becoming increasingly popular for extracting oil and gas from offshore areas. Although most FPSOs are designed...
Journal Articles
Article Type: Ocean Engineering
J. Offshore Mech. Arct. Eng. August 2009, 131(3): 031102.
Published Online: May 28, 2009
... to shedding of incomplete or nongeneration of bottom vortices. Since the top vortex is less partially diffused by the opposite sign vorticity from the bottom vortex, the loss of vorticity is reduced ( 35 36 ). This results in an increase in the strength of the top vortices compared with unbounded cases...
Journal Articles
Article Type: Ocean Engineering
J. Offshore Mech. Arct. Eng. May 2009, 131(2): 021101.
Published Online: February 26, 2009
... , “ The Occurrence of Lock-In Under Highly Sheared Condition ,” J. Fluids Struct. , 10 , pp. 555 – 561 . 0889-9746 27 06 2007 07 09 2008 26 02 2009 oil drilling statistical analysis vibrations vortices This study, divided into three parts, is concerned with the analysis...
Journal Articles
Article Type: Ocean Engineering
J. Offshore Mech. Arct. Eng. February 2009, 131(1): 011102.
Published Online: December 11, 2008
... at velocity U = 0.840 m ∕ s = 1.63 Kn . damping direct energy conversion power transmission (mechanical) renewable energy sources springs (mechanical) supports turbulence vibrations vortices Generation of energy by a VIVACE converter is based on extracting kinetic energy from a fluid flow...
Journal Articles
Article Type: Safety And Reliability
J. Offshore Mech. Arct. Eng. February 2009, 131(1): 011601.
Published Online: October 15, 2008
..., the multiple solutions also are all stable. Variation of amplitude with forcing amplitude (Period 2 solution; both sweep; C D = 0.1 ) 15 01 2007 05 04 2008 15 10 2008 drag flow instability fluid oscillations hydrodynamics ropes vibrations vortices...
Journal Articles
Article Type: Ocean Engineering
J. Offshore Mech. Arct. Eng. November 2008, 130(4): 041101.
Published Online: September 16, 2008
... converters is presented as well. 30 01 2007 10 07 2007 16 09 2008 damping life cycle costing patents renewable energy sources vibrations vortices Ocean energy in the form of waves, currents, tides, and thermal and salinity gradients can provide an abundant supply...