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Keywords: drag coefficient
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Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31726-MS
... Coefficient C<sub>d</sub> Bare Pipe Drag Coefficient In this section, drag coefficient values are explored for the case of a bare pipe, i.e. , with no VIV suppression devices and with a circular cross section. Steady Flow Abstract A literature review of experimental and computational...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30814-MS
... performance interaction critical location cross-section slender offshore structure upstream oil & gas offshore structure drag coefficient mooring system fatigue damage DNV GL . DNVGL-RP-C203 . Fatigue Design of Offshore Steel Structure, December 2019 . Vijayaraghavan , V...
Proceedings Papers
Dhyanjyoti Deka, Yenny Chandra, Mike Campbell, Markku Santala, Yiannis Constantinides, Joe Jin, Ilkay Darilmaz, Raja Nadathur, Flora Yiu
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29239-MS
... correlation background current riser 3 dataset drag coefficient riser response viv response Constantinides , Y. and Oakley Jr. , O.H. 2008 . Assessment of Empirical VIV Analysis Tools and Benchmark with Experiments . Presented at the 27th International Conference on Offshore...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28771-MS
... & gas offshore structure simulation wind tunnel test estimation drag coefficient fpso boundary layer reynolds number experiment current load floating production system cfd result shear component offshore technology conference coefficient velocity profile subsea system Cao , Y...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28813-MS
... for the fairing and riser system and confirmed low drag coefficient (0.4) in Malikai environment. Experiments verified it further. The second part of the study was focussed on investigating VIM of TLP and TAD. The CFD simulations were first carried out to validate the motion of TLP at the lab-scale...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27528-MS
... in stationary water. This paper describes the use of CFD coupled with analytical methods to obtain key characteristic parameters associated with an oscillating BOP stack. The analysis shows that the steady-state drag coefficient significantly under predicts the drag coefficient for an oscillating BOP stack...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-26874-MS
.... These drag coefficients could be used in conventional calculations for overturning moment analysis. With that goal in mind, no wind profile was applied; the entire SE MODU was exposed to a constant wind velocity. All structures were included in the model to capture any aerodynamic interactions. The forces...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 5–8, 2014
Paper Number: OTC-25244-MS
... is that the models were developed using North Sea data, coupled with an assumption that the surface drag coefficient increases with wind speed. The net result is that at high wind speeds the API RP 2MET relations yield a mean velocity profile that increases too rapidly with height, overestimating wind speeds...
Proceedings Papers
Arun George Antony, John Halkyard, Ken Huang, Young Chan Park, Mohammed Islam, Hisham Moideen, Paul Herrington
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-24207-MS
... stabilized units such as TLPs and Semi-submersibles [18], though not as significant as Spars. spar vortex amplitude test program variation current profile reynolds number turbulence coefficient subsea system vim flow speed drag coefficient upstream oil & gas hull fpso vim response...
Proceedings Papers
George Ross, Richard D Beck, Tim Jennings, Sandeep Jesudasen, Jorge Martinez, Mike Effenberger, Tammer Botros
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-24262-MS
... wind tunnel data otc 24262 drag coefficient setback square derrick reynolds number effect water table beam dual derrick crown drilling equipment wind tunnel testing OTC 24262 Wind Testing of a Dual Derrick Michael Effenberger, George Ross, Stress Engineering Services Inc.; Jorge Martinez...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 2012
Paper Number: OTC-23003-MS
... acceleration (9.81 m/s2), d the particle diameter in m and CD the drag coefficient. CD is a function of the particle Reynolds number Rep. For a sphere at high Rep, it holds CD 0.44. For a sand grain like shape it holds CD 0.9. 4·( )· · 3· · = s f ts f D g d C w (2.1) The (terminal) settling...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 2–5, 2011
Paper Number: OTC-21680-MS
... oil & gas operation otc 21680 crane wire seastate winch speed knowledge management subsea template structural design lesson learnt criteria crane subsea structure coefficient template subsea system installation simulation drag coefficient installation criteria lifting analysis...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 2–5, 2011
Paper Number: OTC-21670-MS
... are very sensitive to assumptions about damping. The use of drag coefficients based on steady flow can significantly underestimate the amount of damping that occurs as the BOP stack oscillates vertically, especially for small-amplitude oscillations. Previous work has shown that this effect occurs in other...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 4–7, 2009
Paper Number: OTC-19881-MS
... otc 19881 coverage density drag coefficient helical strake test result upstream oil & gas ball joint shell global solution offshore technology conference pipe suppression apparatus cylinder new class viv suppression apparatus motion response OTC 19881 Henning Devices: A New...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 5–8, 2008
Paper Number: OTC-19377-MS
... calculations in this paper). The kinematic viscosity was based upon the measured water temperature of 63°F. All of the displacements and drag coefficients are plotted against the Reynolds number. All displacements presented are root mean square values (abbreviated RMS or rms), also known as the quadratic mean...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 5–8, 2008
Paper Number: OTC-19161-MS
.... Using a 0.09m diameter, 2.4m long flexible model riser, suppression performance, design sensitivity, and general handling features were determined. At the highest velocity, equivalent to a Reynolds Number of 1.4x105, VIV amplitude was reduced to ~ 0.02D, and drag coefficient to 1.12. High frequency...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 5–8, 2008
Paper Number: OTC-19289-MS
... reduced velocities (Vr) and amplitude ratios (A/D). Non-Oscillatory Tow Test The inline drag coefficient is calculated with the following equation: (2) Where: velocityTowhorizontalV pipetheofLengthL pipetheofdiameterouterD waterofmassspecific forceinlinemeanhorizontalF...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 5–8, 2008
Paper Number: OTC-19173-MS
... and formulation drilling fluid chemistry upstream oil & gas slurry flow reynolds number submarine debris flow impact drag coefficient drilling fluids and materials impact force pipeline OTC 19173 Submarine Debris Flow Impact on Pipelines: Drag Forces, Mitigation, and Control Arash Zakeri, Kaare...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 2007
Paper Number: OTC-18973-MS
... circumcised by the strake roots V flow velocity (m/s) L section length of riser (m) A amplitude of vibration A* amplitude ratio * AA D = CD drag coefficient 21 2 Mean D Drag C LDV = CLV lift coefficient 21 2 V LV Lift C LDV = h strake height from root to tip (m) VR reduced velocity R O VV f D = Re Reynolds...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 2007
Paper Number: OTC-18646-MS
... top tension drilling riser management drilling riser riser management drilling contractor riser andy westlake otc 18646 riser angle angle 7 drag coefficient flex joint angle westlake operability operation kalyan uppu otc 18646 limitation upstream oil & gas Copyright 2007...
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