Numerical Simulation of the Flow Around an Array of Free-Surface Piercing Cylinders in Waves

2007 ◽  
Author(s):  
Roberto Muscari ◽  
Andrea Di Mascio ◽  
Riccardo Broglia
Keyword(s):  
Numerical Simulation ◽  
Free Surface ◽  
Viscous Flow ◽  
Wave Height ◽  
Inviscid Flow ◽  
Incoming Wave ◽  
An Array Of Cylinders

This work deals with the viscous flow around an array of cylinders impinged by an incoming wave. Different configurations are considered in order to evaluate the effects of both wave heading and wave height on the loads applied to the bodies and on the run-ups. The results are also compared to previous calculations obtained with the assumption of inviscid flow with the aim of evaluating the contribution of viscosity.

Numerical Simulation of the Flow Around Free-Surface Piercing Bodies in Waves by an Overlapping Grids Approach

2006 ◽  
Author(s):  
Roberto Muscari ◽  
Andrea Di Mascio ◽  
Riccardo Broglia
Keyword(s):  
Numerical Simulation ◽  
Free Surface ◽  
Wave Front ◽  
Inviscid Flow ◽  
Incoming Wave ◽  
Local Loads ◽  
Overlapping Grids ◽  
Computational Mesh ◽  
Global And Local ◽  
Level Set Approach

The topic of this work is the numerical simulation of a problem of interest in the field of offshore technology, namely the inviscid flow around four free–surface piercing cylinders in waves. Three different angles of the incoming wave front are considered in order to investigate the variation of the resulting global and local loads on the four bodies. The rotation of the cylinders configuration with respect to the wave front has been made easy and efficient by the use of a chimera method for the generation of the computational mesh. The free–surface has been simulated by an one–phase level set approach.

Viscous flow about a submerged circular cylinder induced by free-surface travelling waves

1998 ◽  
Vol 374 ◽  
pp. 173-194 ◽  
Author(s):  
B. YAN ◽  
N. RILEY
Keyword(s):  
Reynolds Number ◽  
Free Surface ◽  
Circular Cylinder ◽  
Viscous Flow ◽  
Travelling Waves ◽  
Inviscid Flow ◽  
Large Reynolds Number ◽  
Flow Limit ◽  
Wide Range ◽  
Circulatory Motion

Viscous flow about a circular cylinder that is submerged beneath free-surface travelling waves is considered. The wave amplitude is assumed small and results are presented for a wide range of Reynolds number. Particular attention is focused on the second-order time-averaged flow that manifests itself as a circulatory motion about the cylinder. The paper complements earlier work on this problem by Yan & Riley (1996) in the large Reynolds number, boundary-layer, regime and Riley & Yan (1996) in the inviscid flow limit, and makes a comparison with experimental work by Chaplin (1984) possible.

The Concept of the Optimum Alignment of Discharge Pipelines Due to the Minimization of the Wave Forces

1992 ◽  
Vol 25 (9) ◽  
pp. 211-216
Author(s):  
A. Akyarli ◽  
Y. Arisoy
Keyword(s):  
Wave Height ◽  
Wave Force ◽  
Wave Forces ◽  
Wave Direction ◽  
Incoming Wave ◽  
Pipeline Route ◽  
Optimum Alignment ◽  
The Cost ◽  
Resultant Wave

As the wave forces are the function of the wave height, period and the angle between the incoming wave direction and the axis of the discharge pipeline, the resultant wave force is directly related to the alignment of the pipeline. In this paper, a method is explained to determine an optimum pipeline route for which the resultant wave force becomes minimum and hence, the cost of the constructive measures may decrease. Also, the application of this method is submitted through a case study.

Numerical Simulation of the Free-Surface Turbulent Flow around a VLCC Ship Hull

2007 ◽  
Author(s):  
Adrian Lungu ◽  
Theodore E. Simos ◽  
George Psihoyios ◽  
Ch. Tsitouras
Keyword(s):  
Numerical Simulation ◽  
Free Surface ◽  
Turbulent Flow ◽  
Ship Hull

Simulation of the Gap Resonance Between Two Rectangular Barges in Regular Waves by a Free Surface Viscous Flow Solver

2013 ◽  
Author(s):  
B. Elie ◽  
G. Reliquet ◽  
P.-E. Guillerm ◽  
O. Thilleul ◽  
P. Ferrant ◽  
...  
Keyword(s):  
Experimental Data ◽  
Free Surface ◽  
Viscous Flow ◽  
Stokes Equations ◽  
Resonance Phenomenon ◽  
Navier Stokes ◽  
Regular Waves ◽  
Navier Stokes Equations ◽  
Flow Solver ◽  
Gap Resonance

This paper compares numerical and experimental results in the study of the resonance phenomenon which appears between two side-by-side fixed barges for different sea-states. Simulations were performed using SWENSE (Spectral Wave Explicit Navier-Stokes Equations) approach and results are compared with experimental data on two fixed barges with different headings and bilges. Numerical results, obtained using the SWENSE approach, are able to predict both the frequency and the magnitude of the RAO functions.

Numerical simulation of sloshing with large deforming free surface by MPS-LES method

2012 ◽  
Vol 26 (4) ◽  
pp. 653-668 ◽  
Author(s):  
Xu-jie Pan ◽  
Huai-xin Zhang ◽  
Xue-yao Sun
Keyword(s):  
Numerical Simulation ◽  
Free Surface

Numerical Simulation of a Podded Propulsor in Viscous Flow

2009 ◽  
Vol 21 (1) ◽  
pp. 71-76 ◽  
Author(s):  
Chun-yu Guo ◽  
Ning Ma ◽  
Chen-jun Yang
Keyword(s):  
Numerical Simulation ◽  
Viscous Flow ◽  
Podded Propulsor
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