Session: 12-02-01 Wave-Structure Interactions I
Paper Number: 124760
124760 - Numerical Modeling of Fluid Kinematics Due to Plunging Breaking Wave Impingement on a Deck Structure
This study aims to conduct a numerical modeling of fluid kinematics resulting from the impingement of plunging breaking waves on a deck structure. The endeavor entails addressing the intricacies associated with generating plunging breaking waves within a numerical tank and simulating the turbulent and multiphase characteristics of fluid flows. To this end, a numerical model is employed, comprising a two-dimensional Reynolds-Averaged Navier-Stokes (RANS) solver, a k-ε closure model, and the volume of fluid method. The generation of plunging breaking waves is achieved through the application of a focused wave method, rooted in NewWave theory (Tromans et al. 1991). For validation purposes, a laboratory experiment is carried out, providing measured data. To align the simulated flow behavior with experimental observations, an adjustment to the power spectral density and frequency range of the focused wave train, serving as the wave generation boundary condition, is implemented. This adjustment proves to be highly effective. To further assess this strategy, four distinct cases, each defined by a specific frequency range, are selected for examination. Comparative analyses of mean free surface and mean velocity profiles are conducted between the simulated results and the measured data across all cases. The outcomes of this study reveal the successful replication of flow phenomena in non-aerated and partially aerated regions, an achievement scarcely documented in existing literature. However, limitations arise in highly aerated regions, where the present numerical model struggles to account for subtle surface tension effects.
Presenting Author: Yu-Jan Wang National Taiwan Ocean University
Presenting Author Biography: Mr. Wang obtained his master's degree from the Department of Harbor and River Engineering at National Taiwan Ocean University, Keelung, Taiwan. Currently, he holds the position of research assistant in the same department, where his research primarily centers around wave-structure interaction, computational fluid dynamics, and structural dynamics.
Authors:
Ting-Chieh Lin National Taiwan Ocean UniversityYu-Jan Wang National Taiwan Ocean University
Wei-Liang Chuang National Sun Yat-sen University
Tai-Wen Hsu National Taiwan Ocean University
Numerical Modeling of Fluid Kinematics Due to Plunging Breaking Wave Impingement on a Deck Structure
Submission Type
Technical Presentation Only