Three-Dimensional Numerical Study on the Interaction Between Dam-Break Wave and Cylinder Array

Abstract

Energy dissipation mechamism is the key to study tsunami hazard mitigation. Numerical method is adopted to study the interaction between bores and square cylinders. The model solves the three-dimensional Navier–Stokes equations with Large-Eddy Simulation turbulence model. The Volume-of-fluid (VOF) method is used to track the complex free surface. We focus the investigation on the effect of cylinder height on the flow field. The results show that the turbulence diffusion is the main mechanism for energy dissipation. The flow patterns are significantly different within and beyond the cylinder array. The taller cylinders cause smaller velocity magnitude in the downstream area. In addition, a larger value of velocity magnitude and vorticity near the bottom is identified in the tall-cylinder case. These unique featuers make different dissipation rates.

Numerical Analysis of Free-Surface Flows over Rubber Dams

“…The numerical solver was modified from the open-source software Truchas, which was developed by Los Alamos National Laboratory [26]. The same code has been used to study liquid sloshing in a baffled tank [27], free-surface flows over rectangular bridge deck [28], circular pipeline [29], and cylinder array [30]. In this study, the convergence criterion was set as 10 −6 for the momentum equation.…”