... and established a methodology. The established methods were then used to predict VIM for Malikai TLP and combined motion of TLP-TAD. The drag and lift coefficient for the lab scale TLP at reduced velocity of 10 and heading of 22.5° was 1.33 and 0.13 respectively. The nominal surge, sway and yaw amplitude...

... was designed to measure the VIV suppression efficiency of the Polyethylene strakes as well as some hydrodynamic coefficients, such as drag, lift, and added mass coefficients. This paper will concentrate on estimating the VIV suppression efficiency factor by reviewing the lift coefficients of the strakes...

... 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...

... industry-accepted tools for frequency domain VIV analysis (Shear7). upstream oil & gas turbulence model configuration marine riser lift coefficient cross-section cfd boundary engineering accuracy viscosity eddy viscosity boundary layer otc 18348 reynolds equation calculation...

... a strategy for both single pipe and the non-symmetric riser bundle tests. 2H managed the tests for BP and provided post analysis. The objectives of this paper is to present: Lift coefficients obtained from the large scale single rough pipe tests Parabolic lift curves created from the single rough pipe...

... been developed to estimate the potential for interference between two risers, one in the wake of the other. The computational procedure involves the use of ABAQUS as a core time domain solver in conjunction with SHEAR7 for VIV and drag amplification, and a wake model for the drag and lift coefficients...

... conference flow velocity otc 11998 frequency experiment lift coefficient larsen drag coefficient upstream oil & gas vikestad cylinder amplitude vortex-induced vibration kyrre vikestad Copyright 2000, Offshore Technology Conference This paper was prepared for presentation at the 2000...

... transverse motion lift coefficient frequency vortex-induced loading loading correlation length oscillatory flow bearman transverse force OTe 6817 Vortex-Induced Loading on Offshore Structures: A Selective Review of Experimental Work D.M. Sheppard and A.F. Omar, U. of Florida Copyright 1992...

... currently uncertain parameters, such as dynamic lift coefficient and spanwise correlation [6]. The Brown & Root simplified design procedure [5] was a compromise between DnV(1991) and ESDU 85038. It adopted K. in its formulation and yet allowed for a variation of the lift coefficient in different...

... range of test parameters allows the cables to be well characterized. hydrodynamic force cable model loading function naval ship research characteristic coefficient drag force lift coefficient equation yaw angle hydrodynamic characteristic cable drag data cable geometry drag...

... ambient (undisturbed) water particle velocity and acceleration, and C D , C M and C G are timeinvariant drag, inertia and lift coefficients. Equation (1) is commonly referred to as the Morison equation. The hydrodynamic force coefficients, C D , C M and C L are often taken from the 1976 or 1981 DnV...

... cylinder value lateral geoola lift coefficient variation lift force downstream cylinder wake centre-line tandem arrangement arrangement OTC 5007 Hydrodynamic Forces on a Pair of Cylinders by A. Bokaian and F. Geoola, University College London Copyright 1985 Offshore Technology Conference...

... cylinder sarpkaya yawed cylinder independence principle us government lift coefficient upstream oil & gas smooth cylinder rough circular cylinder inertia coefficient coefficient reynolds number keulegan-carpenter number cylinder investigation circular cylinder rms value normal...

... in oscillating and wave flows has not been sufficiently explored. frequency dynamic response harmonic flow equalization experiment sarpkaya oscillation keulegan-carpenter number cylinder hydrostatic pressure lift coefficient amplitude upstream oil & gas projector perfect synchronization...

... provided that the boundary" layer remains laminar. evidently cylinder rough cylinder boundary smooth cylinder oscillation lift coefficient roughened cylinder artificial intelligence reynolds number transverse force machine learning fraction inline inertia coefficient inline force...

... on to the natural frequency of the cylinder. The lift coefficient is amplified by a factor of about two relative to that for a stationary cylinder in harmonic flow. The relative amplitude of oscillation for both smooth and rough cylinders is a unique function of the response parameter R p . INTRODUCTION...

..., and roughness effects on the in-line and transverse force coefficients (i.e., drag, inertia, and the lift coefficients have recently been carried out by Sarpkaya. These studies were prompted by the need for systematic data and partly by the controversy concerning the influence of Reynolds number and surface...

... number drag coefficient roughened cylinder lift coefficient harmonic flow cylinder relative roughness coefficient roughness element rough cylinder coherence steady flow variation smooth cylinder evidently circular cylinder keulegan-carpenter number OTe 2901 WAVE FORCES ON ROUGH-WALLED...

... of the Morison's equation. The transverse force has been expressed in terms of a single lift coefficient. The results have shown that the effect of wall-proximity is to increase the force coefficients for-relative gaps of e/D less than about 0.5. In this range of e/D values (0<e/D?0.5) the non-linear...

... validation. Mathematical modeling and numerical techniques have been used by l 2 3 many investigations. cable system oscillator model lift coefficient engineer differential equation frequency energy flow upstream oil & gas vibration bond graph method experimental data cable-body system...