... oscillatory flow mass coefficient reynold upstream oil & gas variation pipe kc number inertia coefficient presented coefficient drag coefficient Introduction A fundamental consideration in riser design is the modeling of fluid forces on pipe. The nature of these forces is complex...

... and it has been gen- erally shown that roughness (a) increases tube diame- ter, projected area, displaced volume and hence the hydrodynamic loading; (b) increases both drag and lift coefficients, leading to larger fluid forces (the decrease in the inertia coefficient (Cm = + Ca) is more than off- set...

... leg dimension wave angle cylinder circular cylinder experiment inertia coefficient platform design stationary flow kcnumber drilling equipment wave loading experiment coefficient OTC 6407 Wave-Loading Experiments on Elements of Jackup Legs at Large Scale S.T. Schuurmans, Delft...

... in the literature do not provide the basis for an accurate assessment of the added mass applied in determining natural frequencies for the onset of structural vibrations. SOME FUNDAMENTALS OF ADDED MASS AND INERTIA FORCES By using the integrated load concept and the added mass or inertia coefficients the actual...

... ? = wave frequency and f = force as a function of time, t. The expression of the force coefficient can be derived in terms of inertia and drag coefficients, C M and C D , respectively, as and the force coefficient wave force coefficient upstream oil & gas inertia coefficient cylinder...

... drag and inertia coefficients. However, the drag coefficient needed to explain the loads in the wave plus current tests is considerably smaller than expected from laboratory data on single cylinders. This may be a scale effect or it may be due to shielding. The incremental total vertical force due...

... in. and frequencies ranging from 0.4 to 0.9 Hz that the Monson equation, with Stokes wave theory and constant drag and inertia coefficients of 1.2 and 1.8, respectively, provides good agreement with the measured maximum wave forces. The force variation over the entire wave cycle is also well represented...

... riser drag coefficient coefficient fatigue life reynolds number keulegan-carpenter number inertia coefficient maximum reynolds number sensitivity constant coefficient water depth hydrodynamic coefficient OTC 4592 Sensitivity of Marine Riser Response to the Choice of Hydrodynamic...

... and inertia coefficients of 0.7 and 1.7, respectively, and with no consideration of current or marine growth. Total wave load (shear) distributions can be directly inferred from the member load distributions. A parameter study indicates that the addition of large currents and levels of marine growth...

... speculative generalizations have dominated the calculation of wave forces on offshore structure for over thirty years, (see Sarpkaya 1 for a detailed discussion). Numerous attempts have been made to evaluate the drag and inertia coefficients and to extend Morison?s equation to far more complex situations...

... 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...

... ABSTRACT This paper presents a review of wave force predictions for rough and smooth cylinders. The Morison equation and some basic results for the drag and inertia coefficients in laboratory and ocean tests are reviewed. New results for rough cylinders at large Reynolds number are also...

... ABSTRACT The in-line and transverse forces acting on smooth and sand-roughened circular cylinders placed on a plane boundary (with no gap) in a sinusoidally oscillating flow in a U-shaped vertical water tunnel have been measured. The drag and inertia coefficients for the in-line force have...

... ABSTRACT The lift, drag, and inertia coefficients have been determined experimentally for two cylinders at various positions subjected to harmonically oscillating flow. The cylinders were placed at 0, 30°, 60°, and 90° to the flow direction in separate series of tests. The spacing between...

... ABSTRACT The interference effect in steady and time-dependent flows is briefly reviewed and the drag and inertia coefficients for two particular riser configurations subjected to harmonic flow are presented. INTRODUCTION A body's resistance to flow is strongly affected by what surrounds...

... requiring the calculation of the wave kinematics, and presentation of drag, lift, and inertia coefficients that can be used in the Morison equation in combination with. Stokes' third-order wave theory. All results have been presented in a dimensionless form. Assuming that the laws of hydraulic...

... from 1/800 to 1/50. The drag and inertia coefficients have been determined through the use of the Fourier analysis and the least squares method. The transverse force (lift) has been analysed in terms of its maximum and root-mean-square values. In addition, the frequency of vortex shedding...

... ABSTRACT The in-line and transverse forces acting on circular cylinders placed near a plane boundary in a sinusoidally oscillating fluid in a U-shaped vertical water tunnel have been measured. The drag and inertia coefficients for the in-line force have been determined through the use...

... and vertical and horizontal inertia coefficients. Where possible correlations of the values obtained with certain wave parameters were carried out. The data are plotted and summarized herein. The force coefficients discussed are of two types those associated with the measured kinematics, and those .derived...

... time to form before the flow reverses in the usual sense. inertia coefficient mass coefficient wave height coefficient cylinder plane boundary yamamoto horizontal force perpendicular upstream oil & gas oregon state university reservoir characterization wake effect engineer...