MOTION OF SOLID SPHERES UNDER SOLITARY WAVE ATTACK: PHYSICAL AND NUMERICAL MODELING

Hasan Gokhan Guler,Taro Arikawa,Koray Deniz Gã¶Ral,Cuneyt Baykal,Ahmet Cevdet Yalciner

doi:10.9753/icce.v36.papers.81

Abstract

In this study, physical and numerical test are carried out focusing on the motion of two solid spheres under solitary wave attack. The numerical model CADMAS-SURF/3D-2F-DEM coupling a multiphase flow solver solving Reynolds Averaged Navier-Stokes Equations based on a porous body model and a discrete element method solver for Newtonâ€™s equations of motion is validated against the data of physical model experiments carried out in the wave flume of METU Ocean Engineering Research Center. Comparisons of the numerical simulations and physical model experiments show that the numerical model is capable of simulating the motion of solid spheres under solitary wave attack in a reasonably well accuracy.

Highlights

Numerical simulations using computational fluid dynamics (CFD) tools coupled with discrete element method (DEM) solvers for engineering purposes gained popularity in the last two decades, as a well-developed CFD-DEM solver is capable of simulating the motion of solid particles under flow conditions
The numerical model consists of a flow solver coupled with a DEM solver
In the scope of this validation study, the DEM solver is slightly modified to account for the pressure forces at the surrounding cells of a single particle

Summary

Introduction

Numerical simulations using computational fluid dynamics (CFD) tools coupled with discrete element method (DEM) solvers for engineering purposes gained popularity in the last two decades, as a well-developed CFD-DEM solver is capable of simulating the motion of solid particles under flow conditions. CFD-DEM solvers could be used to assess motion of rubble stones under wave attack. Accurate numerical modeling of motion of solid spheres under wave attack is vital as the first step towards modeling motion of rubble stones. The motion of two solid spheres under breaking solitary wave attack are physically and numerically modeled. The major aim of the study is to extend the understanding of the physical processes involved in the motion of the solid spheres under breaking solitary wave attack and to calibrate/validate the numerical model used in the present study with a simple experimental configuration

Objectives

Methods

Results

Conclusion