scholarly journals Effect of nonlinear wave-current interaction on flow fields and hydrodynamic forces

1997 ◽  
Vol 40 (6) ◽  
pp. 622-632 ◽  
Author(s):  
Tao Wang ◽  
Jiachun Li
Keyword(s):  
Nonlinear Wave ◽  
Flow Fields ◽  
Hydrodynamic Forces ◽  
Current Interaction

scholarly journals Nonlinear Wave–Current Interaction in Water of Finite Depth

2016 ◽  
Vol 142 (6) ◽  
pp. 04016009 ◽  
Author(s):  
Zhen Liu ◽  
Zhiliang Lin ◽  
Longbin Tao ◽  
Jian Lan
Keyword(s):  
Nonlinear Wave ◽  
Finite Depth ◽  
Current Interaction

scholarly journals Nonlinear Wave Evolution in Interaction with Currents and Viscoleastic Muds

2021 ◽  
Vol 9 (5) ◽  
pp. 529
Author(s):  
Elham Sharifineyestani ◽  
Navid Tahvildari
Keyword(s):  
Surface Wave ◽  
Nonlinear Wave ◽  
Laboratory Data ◽  
Domain Model ◽  
Random Wave ◽  
Random Waves ◽  
Wave Interactions ◽  
Wave Damping ◽  
Surface Wave Propagation ◽  
Current Interaction

A numerical model is extended to investigate the nonlinear dynamics of surface wave propagation over mud in the presence of currents. A phase-resolving frequency-domain model for wave-current interaction is improved to account for wave modulations due to viscoelastic mud of arbitrary thickness. The model compares well with published laboratory data and performs slightly better than the model with viscous mud-induced wave damping mechanism. Monochromatic and random wave simulations are conducted to examine the combined effect of currents, mud-induced wave dissipation and modulation, and nonlinear wave-wave interactions on surface wave spectra. Results indicate that current effects on wave damping over viscoelastic mud is not as straightforward as that over viscous mud. For example, while opposing currents consistently increase damping of random waves over viscous mud, they can decrease damping over viscoelastic mud due to high variations in frequency-dependent damping stemming from mud’s elasticity. It is shown that a model that assumes the mud layer to be thin for simplification can overestimate wave damping over thick mud layers.

RANS Simulation on Hydrodynamic Forces of a Horizontal Cylinder in Focused Steep Waves and Current

2014 ◽  
Author(s):  
Junli Bai ◽  
Ning Ma ◽  
Xiechong Gu
Keyword(s):  
Nonlinear Interaction ◽  
Offshore Structures ◽  
Horizontal Cylinder ◽  
Hydrodynamic Forces ◽  
Wave Forces ◽  
Offshore Structure ◽  
Wave Deformation ◽  
Current Interaction ◽  
Focused Wave ◽  
Steep Waves

The wave and current loads are the primary loads acting on the offshore structures. Rogue wave, a typical steep wave, is considered to occur due to wave focusing and wave-current interaction in the ocean and becomes one of the major causes of offshore structure damage. In this study, the hydrodynamic forces on horizontal cylinders exerted by the focused steep waves has been investigated considering wave-current interaction. The RANS equations solving by finite volume method are applied to evaluate the strongly nonlinear interaction between waves and current, in which the VOF method is adopted to capture the free surface. The velocity and water depth are given at the inlet boundary of the computation domain to generate deep water focused wave. In this paper, the wave forces acting on the cylinder in focused waves without current are investigated firstly. The wave forces are simulated for different horizontal distances between the cylinder and the pre-designed wave concentration point, and the maximal wave forces are analyzed. Meanwhile, the effects of the cylinder on wave deformation are also discussed. To validate the numerical model, the simulation results of wave forces on a cylinder by regular wave and the water surface elevation of a focused wave are compared with published experiment and simulated results. Then, the nonlinear interaction between the focused wave and current are investigated, the hydrodynamic forces acting on cylinder are simulated for different current velocities. Accordingly, the nonlinear effects of wave-current interaction on the hydrodynamic forces are discussed with respect to the results of wave deformation at concentration point, forces under actions of focused wave and combined wave-current conditions.

Recurrence of fragmenting granules and their relation to meso- and supergranular flow fields

2003 ◽  
Vol 9 ◽  
pp. 371-371
Author(s):  
Th. Roudier ◽  
F. Lignières ◽  
M. Rieutord ◽  
P. N. Brandt ◽  
J.-M. Malherbe
Keyword(s):  
Flow Fields
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