... by the motion of waves and currents, respectively. However, the studies of local scour around combined steady and oscillatory flow are limited. In this study, local scour around subsea pipelines under combined steady and oscillatory flow is investigated using numerical method. The numerical model comprises RANS...

... in the oscillatory flow is scarce. In this paper, a 2-D slender body is constructed based on the horizontal section of fish in anguilliform swimming mode. The oscillatory flow past the wave slender body, which is used to model the undulatory body of fish swimming steadily, is studied. By varying the shape...

... Abstract In this paper, the forced vibration and vortex induced vibration of a cylinder under the combined action of uniform flow and oscillatory flow were numerically simulated by using dynamic grid technology. The effects of the distance between the cylinder and the wall and the number...

... slope 1/15, as well as the corresponding suspended sediment transport. Moreover, the sediment transport mechanisms and the resulting morphological evolution of rippled beds were also examined under oscillatory flow conditions generated by non–breaking waves, with numerical results of ripple creation...

... in both steady and oscillatory flow. Dynamics of a kelp longline system are studied for tidal currents scenarios. Results show that the longline tension follows water level to the peak at high tide and sensitive to water level in high tide. The non-parallel currents could enhance the tension as well...

... with crossflow freedom restricted and freely vibrating are compared. INTRODUCTION In actual production, the periodic oscillation of floating structures may generate relative oscillatory flow between the riser and the water. Experiments and numerical simulations of oscillatory flow around a circular cylinder...

... frequency of the regular wave column height above pontoon height of the regular wave significant height IW irregular wave Keulegan Carpenter number 0 equivalent for irregular oscillatory flow column face dimension total mass pontoon height RW regular wave 55 radius of gyration in the axis 77...

... to investigate the VIM (Vortex-Induced-Motions) related fatigue damage on the risers of a Semi-Submersible FPS (Floating Production System) in South China Sea. To better evaluate this kind of fatigue damage, the global VIM motion and the VIV (Vortex-Induced-Vibration) induced by the so called "oscillatory flow...

... ABSTRACT The objectives of this study are to obtain the turbulence characteristics produced by an oscillatory flow over three-dimensional (3-D) vortex ripples and the comparison of the corresponding results to the ones over two-dimensional (2-D) ripples. Four cases of sinusoidal ripples were...

... ABSTRACT The present work is focused on the large-eddy simulation (LES) of oscillatory flow and sediment transport dynamics over a rippled bed. A morphological module was also developed and used to perform simulations of the bed form evolution under hydrodynamic/sediment forcing. Results...

... are deeply analyzed and discussed. INTRODUCTION Cylinders in oscillatory flow have been attracting extensive concern due to its significant scientific contribution to people's understanding on mechanism of vortex and its wide spread in engineering field after reasonable simplification since water particle...

... Vortex-Induced Vibrations of a Flexible Cylinder Experiencing an Oscillatory Flow Bowen Fu1, Decheng Wan1*, Zhiqiang Hu2 1 State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Collaborative Innovation Center...

... to the fluid structure interaction problem of cylinders open to the uniform flow that has been widely investigated, cylinders in the oscillatory flow has attracted less attention (Xu, 2013). However its significance cannot be undermined for its rich physics as well as its prevailing existence in all kinds...

... of the oscillatory flow over three-dimensional (3-D) vortex ripples by means of an advanced Navier-Stokes solver and compare the behavior of the results with respect to the corresponding ones for two- dimensional (2-D) ripples. Two cases of sinusoidal ripples were examined: a 2-D case of constant ripple length Lr...

... Large Eddy Simulation of Oscillatory Flow, Sediment Transport and Morphology Evolution over Ripples based on the Immersed Boundary Method Georgios A. Leftheriotis, Athanassios A. Dimas Department of Civil Engineering, University of Patras Patras, Greece ABSTRACT In the present study, a three...

... in regular and irregular oscillatory flow conditions. The results were used to improve existing formulas to predict time-averaged concentration 1217 Proceedings of the Twenty-sixth (2016) International Ocean and Polar Engineering Conference Rhodes, Greece, June 26-July 1, 2016 Copyright © 2016...

... Abstract Oscillatory flow around a large sphere resting on a plane and rough bottom is simulated by means of direct numerical simulations of continuity and Navier-Stokes equations. The bottom roughness is provided by a layer of spherical particles, the size of which is much smaller than...

... Abstract The paper presents an experimental study of local scour around truncated vertical piles subject to oscillatory flow. The experiments were conducted with six height-to-diameter ratios ( h/D =0.25~3.5) and three KC numbers (33, 52 and 80). The development of scour depth around...

... cylinder in uniform flow and compare the oscillating motion amplitude of cylinder and lift coefficient in combination of uniform and oscillating flow at high and low mass ratio. high mass ratio oscillatory flow frequency lift coefficient time history cylinder mass ratio motion amplitude...

... condition equation vorticity flux upstream oil & gas vorticity contour elevation ripple free surface nonlinearity blondeaux reservoir characterization oscillatory flow viscosity variation Boussinesq Modeling of Wave-Vortex Interaction Meng-Yu Lin Department of Civil Engineering, Chung...