Numerical Investigation on the Collision between a Solitary Wave and a Moving Cylinder

Abstract

A 2-D numerical wave tank (NWT) was applied for solving the interaction between a solitary wave and a moving circular cylinder. The cylinder was placed at various positions from the tank bed floor. The cylinder can move at a constant horizontal velocity towards the solitary wave. The collision between a solitary wave and a moving cylinder is investigated at various conditions. A total of fifteen cases were studied. Ten different numerical simulations were used, including five submergence depths and two different moving velocities. The other five different numerical simulations were studied when the cylinder was unmoved in the NWT for comparing wave-structure interaction results between the moving and unmoved cylinders. The numerical results were obtained by calculating Reynolds-Averaged Navier-Stokes (RANS) equations and the volume of fluid (VOF) equations. Two different codes (User-Define-Function-UDF) were used for the generation of a solitary wave by moving a wave paddle and traveling cylinder in the NWT. The dynamic mesh method was applied for recreating mesh. First, the ability of CFD codes to generate a solitary wave by using wave paddle movement and the hydrodynamic forces of a moving cylinder were validated by numerical results. Further, the free-surface elevation and hydrodynamic forces were considered at various conditions. The numerical results show that moving cylinder velocity and the space between the cylinder and the tank bed floor have significant effects on surface displacement and hydrodynamic forces.

Three-Dimensional Fluid–Structure Interaction Case Study on Elastic Beam

“…They showed that numerical results were so close to the experimental data. Hydrodynamic forces of a moving cylinder and fixed cylinder were investigated numerically by Eren et al [26]. They used the dynamic mesh method for recreating mesh and moving a cylinder in the incompressible flow.…”

Numerical Modeling of Interactions between Solitary Waves and Floating Breakwaters

“…We applied a 2D study containing water and air domains which were divided by a free surface boundary. We used the RNG k−ɛ turbulence one to solve the turbulent flow as given in Eren et al (2020), Tian et al (2018) and ANSYS, Inc. ( 2013), because it can model complex shear flows and improve solutions' accuracy. The governing formulas including the continuity and momentum equations are written as follows: 10 -6 was chosen for the criteria value of convergence of governing equations.…”

“…The existing work is a continuation of the authors' former work (Eren et al 2020). Here, we have used Ansys Fluent for modeling three different SWs and three different floating breakwaters.…”

“…The researchers carried out simulations of SW relation with a plane plate at various water depths, submergence depths below and altitudes above the SWL, and wave amplitudes. Eren et al (2020) numerically researched the collision between a SW and a dynamic chamber. The researchers applied a 2D NWT with a piston-type wave-producer to produce the SW.…”