...-flow direction, which is the simplest configuration of cylindrical structures. One can refer to the review by Bearman (1984), Parkinson (1989), Blevins (1990), Sarpkaya (2004) and Williamson and Govardhan (2004). However, unlike single rigid cylinder, it has not been researched so extensively for two...

...) and solution methods were validated by comparisons of blind numerical predictions with experimental results. circular cylinder drag coefficient oscillator model pipe païdoussis equation cylinder coefficient interaction fluid struct vortex-induced vibration upstream oil & gas bearman...

... viscous and pressure loads on the riser surface. The computed vortex patterns and dynamic responses of the risers are in good agreement with the experimental data. bearman tandem arrangement downstream riser side-by-side arrangement upstream oil & gas calculation cylinder vertical riser...

... is especially of interest in fields of offshore and civil engineering, such as marine risers, subsurface pipelines, etc. Such flows have been investigated by many researchers, e.g., Sarpkaya(1975,1986), Williamson(1985), Bearman et al.(1985), Obasaju et al.(1988), Tatsuno and Bearman(1990), Justesen (1991...

... by the capture of the vortex shedding frequency by the oscillation frequency over a range of cylinder oscillation amplitudes. This phenomenon is called lock-in. Meneghini, Saltara and Bearman (1997) investigated square, saw-tooth and parabolic wave forms of cylinder transverse oscillations, and found that only...

... frequency low reynolds number navier-stoke equation upstream oil & gas amplitude finite element method artificial intelligence vibration reynolds number anagnostopoulo equation algorithm formulation bearman cylinder oscillation Proceedings of the Seventh (1997) International Offshore...

... production control production monitoring bearman equation rough cylinder flume roughness experiment lse method Proceedings of the Seventh (1997) International Offshore and Polar Engineering Conference Honolulu, USA, May 25-30, 1997 Copyright © 1997 by The International Society of Offshore...

... high drag due to the low pressure in the wake. frequency upstream oil & gas square prism vortex resonance bluff body cylinder bearman strouhal number vortex instability fluid mechanics vibration engineering momentum injection coefficient drag reduction Proceedings...

... unsteady flow hydrodynamic force kc 10 production control nearfield flow upwash mode circulation lift force wavefonn waveform bearman velocity measurement coefficient fluid velocity oscillation equation cylinder reservoir surveillance representation upstream oil & gas flowfield...

... generation are also square or rectangular. But so far the existing research on small cylinders has been concentrated on the care of a circular cylinder, with very few studies are related to the square cylinder(Bearman 1980, 1984, Deroich 1992). Consequently the research on wave current forces acting...

... oscillatory flow steady current upstream oil & gas sumer williamson cyhnder offshore pipeline vibration vortex cylinder bearman offshore mechanics Proceedings of tile Fourtll (1994) International Offshore and Polar Engineering Conference Osaka, Japan, April 10-15, 1994 Copyngllt © 1994...

...) coefficient pressure tappmg bearman oscillation different mterbody shape expenment asymptotically approach cylinder cyhnder trapezoidal phase angle prismatic body triangular cylinder cylmder literature tnangular cylinder cross-sectional shape experiment dynamic test trapezoidal cylinder...

... cylinder plane bed drag coefficient computation bearman inertia coefficient hydrodynamic force coefficient free surface special consideration chaplm Proceedings of the Fourth (1994) International Offshore and Polar Engzneenng Conference Osaka, Japan, Apnll0-15, 1994 Copynght © 1994...

... boundary is the fundamental interest in many engineering fields, especially in the design of pipelines and cables on seabed. Scouring due to the vortex shedding could change considersbly the gap between the structures and seabed. Bearman & Zdravkovich(1978) have experimentally investigated the flow...

... coefficient drag coefficient aspect ratio oscillatory flow regular wave current flow horizontal square cylinder inertia coefficient cylinder upstream oil & gas horizontal cylinder bearman Proceedings of the Third (1993) International Offshore and Polar Engineering Conference Singapore, 6-11...

... (1983) but are somewhat larger than the Sarpkaya's (1976 and 1986) and Bearman et aI's (1985). KEY WORDS: Wave forces ,Hydrodynamics .horiZontal cylinders. Oscillatory flow INTRODUCTION 111e Morison equation has been used to determine the wave forces on small membered offshore structures for many years...

... at amplitudes, A, corresponding to KC = 10, 14, 18, and 34. The reduced velocity, U/ND, ranged from 0 to 20. (Here U is the steady current velocity, N is the frequency of cylinder oscillation, D is cylinder diameter, and KC = 2π A/D). The paper complements our earlier work (Bearman and Obasaju (1989)) where...

.... For significant amplitudes of motion the vortex shedding may also change from an antisymmetric to a symmetric mode. vibration bearman circular cylinder displacement computation frequency transverse displacement cylinder compliant cylinder time history vortex inline keulegan carpenter number...