Wave forces on large offshore pipelines
TL;DR: In this paper, a laboratory investigation of wave forces induced by a regular train of waves on a large pipeline resting on the bed and at various clearances from the bed is presented from considerations of dimensional analysis.
About: This article is published in Ocean Engineering.The article was published on 1985-01-01. It has received 10 citations till now. The article focuses on the topics: Potential flow.
Citations
More filters
TL;DR: In this paper, a submarine pipeline fixed horizontally near a simulated ocean bed and parallel to the crests of the oncoming regular waves is formulated as a boundary value problem utilizing Green's second identity formulation for potential functions.
Abstract: The submarine pipeline fixed horizontally near a simulated ocean bed and parallel to the crests of the oncoming regular waves is formulated as a boundary value problem utilizing Green's second identity formulation for potential functions. Numerical results are obtained for the hydrodynamic pressures that act around the circumference of the pipeline in a finite water depth for salient pressure ports by solving the resulting integral equation. The normalized maximum pressure at each pressure port is correlated with scattering parameter, gap ratio of the pipeline from the ocean bed and depth parameter. An experimental investigation has also been carried out on the regular and random wave induced hydrodynamic pressures around a horizontal submarine pipeline placed at various elevations or gaps from the simulated ocean bed. In the random wave pressure experiments, the pipeline was subjected to random waves with Pierson- Moskowitz spectrum (P-M spectrum) at various energy levels to achieve different significant...
6Â citations
TL;DR: In this article, the boundary value problem for a large cylinder fixed parallel to the crests of the oncoming regular waves in a finite water depth using the Green's second identity and linearized potential flow theory is formulated numerically.
4Â citations
TL;DR: In this paper, a series of unsteady, three-dimensional numerical simulations of the incompressible, oscillatory flow around a near-bed pipeline is presented, where the presence of solid boundaries is taken into account by means of the Immersed Boundary method.
2Â citations
TL;DR: In this article, the wave-force coefficients of horizontal circular cylinders inclined with respect to the incoming waves are studied numerically under conditions when the effects of flow separation are insignificant, and a first-order correction to the pressures is introduced to take account of the asymmetry of the velocity field around the cylinder when it is close to the plane bed.
2Â citations
TL;DR: In this paper, a two-dimensional viscous numerical wave flume is established, where the Navier-Stokes equations are discretized by Finite Difference Method (FDM) and the turbulence is considered by using the standard k- e turbulence model.
Abstract: A two-dimensional viscous numerical wave flume is established in this study. The Navier-Stokes equations are discretized by Finite Difference Method (FDM). The turbulence is considered by using the standard k- e turbulence model. Volume of Fluid (VOF) method is adopted to capture the free surface of water wave. A virtual inclined porous structure is devised to absorb the wave energy near the end of computational domain. The numerical wave flume was validated by the comparisons with analytical result. Based on the numerical wave flume, the wave field around submarine pipeline was simulated and the numerical results were compared with experimental data. The comparison results show that the present numerical model works well. The maximum horizontal wave force and vertical wave force increase with the wave height.
Cites background from "Wave forces on large offshore pipel..."
...Jothi et al. (1985) did many experiments to study the wave forces on submarine pipeline....
[...]
References
More filters
639Â citations
TL;DR: In this paper, the problem of an accelerating potential flow past a group of stationary circular cylinders is considered using the method of images, and the problem is formulated so that the number and location of the cylinders is arbitrary so long as there is no overlap between adjacent cylinders.
Abstract: The problem of an accelerating potential flow past a group of stationary circular cylinders is considered using the method of images. The problem is formulated so that the number and location of the cylinders is arbitrary so long as there is no overlap between adjacent cylinders. Inertial and lift coefficients are determined for several different cylinder arrangements. The inertial coefficient for a cylinder can vary in either direction from its single-cylinder value of 2.0. The controlling factors on this variation are the relative geometric position of the cylinder within the group and its distance from its neighbors. These same factors determine, as is expected, the lift coefficient values. In two example configurations, there is even a drag-type force generated on an individual cylinder in the potential flow.
50Â citations
49Â citations
01 Jan 1980
27Â citations
TL;DR: In this paper, a horizontal circular cylinder was experimentally measured to determine the influence of a plane boundary (e/D), A/D, and water depth (h/D) on these forces.
Abstract: Wave forces on a horizontal circular cylinder were experimentally measured to determine the influence of a plane boundary (e/D), water particle displacement (A/D), and water depth (h/D) on these forces. The transition from potential flow conditions to real flow conditions is considered. The variation of force coefficients of inertia, lift, and drag with respect to e/D, A/D, and h/D is identified.
23Â citations