scholarly journals A comparative study of two fast nonlinear free-surface water wave models

2011 ◽  
Vol 69 (11) ◽  
pp. 1818-1834 ◽  
Author(s):  
Guillaume Ducrozet ◽  
Harry B. Bingham ◽  
Allan P. Engsig-Karup ◽  
Félicien Bonnefoy ◽  
Pierre Ferrant
Keyword(s):  
Free Surface ◽  
Surface Water ◽  
Comparative Study ◽  
Water Wave ◽  
Wave Models ◽  
Nonlinear Free Surface

Comparisons of Two Different Mixed Eulerian-Lagrangian Schemes Based on a Study of Flare-Slamming Hydrodynamics

1996 ◽  
Vol 118 (3) ◽  
pp. 174-183
Author(s):  
M. L. Wang ◽  
A. W. Troesch ◽  
B. Maskew
Keyword(s):  
Free Surface ◽  
Comparative Study ◽  
Numerical Simulations ◽  
Fourier Coefficients ◽  
Fully Nonlinear ◽  
Time Stepping ◽  
Time Histories ◽  
Nonlinear Free Surface ◽  
Simulated Time ◽  
Flare Slamming

A comparative study of two different mixed Eulerian-Lagrangian methods is presented. Representative numerical simulations of oscillatory flare-slamming flows are given. Computations based on these two different numerical schemes, i.e., a desingularized method using Rankine ring sources and a source-doublet panel method (e.g., USAERO/FSP©), are compared with experiments. Fourier coefficients of the simulated time histories and experimentally measured forces are given for detailed error comparisons. The numerical simulations demonstrate the ranges of applicability of these two methods. Both are shown to be efficient and robust time-stepping schemes for the fully nonlinear free-surface problem studied here.

Observations on break-up of river ice in north central Alberta

1970 ◽  
Vol 7 (4) ◽  
pp. 457-463 ◽  
Author(s):  
J. B. Nuttall
Keyword(s):  
Free Surface ◽  
Surface Water ◽  
High Velocity ◽  
Water Wave ◽  
River Flow ◽  
Maximum Size ◽  
North Central ◽  
Channel Geometry ◽  
The North ◽  
Break Up

The break-up process on the North Saskatchewan and Pembina Rivers in north central Alberta during 1969 is discussed.It is shown that the maximum size of moving ice can approach the river's width and have a length of four or five times this depending upon channel geometry. A case of radial cracking of an ice sheet at a bridge pier when the sheet was subject to the drag force of high velocity river flow is reported. The rate of progress of a break-up wave on the Pembina River was found to have been approximately that of a free surface water wave of the same height.

Numerical Study for Water Waves Generated by Debris Flow

2013 ◽  
Vol 671-674 ◽  
pp. 388-392
Author(s):  
Rui Jin Zhang ◽  
Hong Yue Sun ◽  
Hong Zhan Zhang ◽  
Hosoyamada Tokuzo
Keyword(s):  
Free Surface ◽  
Surface Water ◽  
Debris Flow ◽  
Water Waves ◽  
Water Wave ◽  
Numerical Study ◽  
Human Life ◽  
Shallow Water Approximation ◽  
Surface Water Waves ◽  
Run Up

Earthquake or rainfall can arouse landslide, which will cause debris flow. Free surface water waves generated by plunging of debris flow cause devastating damage on human life. In this study, a numerical scheme for debris flow and free surface water wave was developed based on shallow water approximation, in which the interaction between these two flows was included newly. Generation of waves by plunging of debris flow is highly non-linear phenomena. Original CIP method and first order up-wind scheme mixed with second order central derivative scheme were adopted to simulate collision of two initially separated fluids (debris flow and still water). Six cases have been adopted to simulate the generation, propagation and run-up of water waves generated by debris flow. The time series of these two flows for these six calculating cases show the interaction of these two flows. Numerical results for interaction of debris flow and generated water wave are quite satisfactory and reasonable.

Numerical Simulation of Nonlinear Free Surface Water Waves: Coupling of a Potential Flow Solver to a URANS/VOF Code

2016 ◽  
Author(s):  
Bülent Düz ◽  
Tim Bunnik ◽  
Geert Kapsenberg ◽  
Guilherme Vaz
Keyword(s):  
Numerical Simulation ◽  
Free Surface ◽  
Surface Water ◽  
Water Waves ◽  
Computational Cost ◽  
Nonlinear Water Waves ◽  
Efficient Manner ◽  
Surface Water Waves ◽  
Wave Models ◽  
Hydrodynamic Wave

Numerical simulation of free surface water waves using various wave models is studied. The performance of the wave models is compared in three test cases in 2D, all of which include a focusing event. Then the attention is focused on coupling one of these wave models to a URANS/VOF code, ReFRESCO. Here the strong suits of both solvers are utilized to simulate nonlinear water waves in an accurate and efficient manner. Even though only simulating nonlinear waves is discussed in this paper, the main purpose of the coupling approach is to simulate hydrodynamic wave loading on structures and wave-structure interaction. Computational cost, convergence behavior and effects of grid refinement are some of the topics that are also discussed throughout the paper.

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