... Abstract A literature review of experimental and computational hydrodynamic research is presented with the objective of highlighting the parameters that affect riser added mass coefficient (C a ) and drag coefficient (C d ). Typical riser analysis is conducted assuming constant values...

... 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...

... 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...

... & 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...

... 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...

... 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...

.... 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...

... 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...

... 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...

... wind load values or perform wind tunnel testing to better understand the loads on the structure. BP elected to perform wind tunnel testing. wind load bare derrick upstream oil & gas test data coefficient wind wall wind tunnel data otc 24262 drag coefficient setback square derrick...

... 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...

... 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...

... 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...

... 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...

.... 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...

... strake case oscillation configuration cylinder upstream oil & gas contact load hydrodynamic test lift coefficient installation roller test strake drag coefficient otc 19289 coefficient vertical oscillation bare pipe polyethylene strake reynolds number deformation pipe...

... by: AUCF DD 2 2 1 (2) where, is the fluid density, CD is the drag coefficient, and U is the free field upstream velocity. For the case of a buried pipeline or a pile in an unstable soil slope, the aforementioned geotechnical approaches (conventional and strain-rate dependent) provide a means...

... 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...

... 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 Abstract...

... 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...