Work

Numerical Study on Wave Run-up of a Circular Cylinder with Various Diffraction Parameters and Body Drafts

Year: 2020

Type: article

Abstract: Wave run-up is an important phenomenon that should be considered in ocean structure design.In this study, the wave run-up of a surface-piercing circular cylinder was calculated in the time domain using the three-dimensional linear and fully nonlinear numerical wave tank (NWT) techniques.The NWT was based on the boundary element method and the mixed Eulerian and Lagrangian method.Stokes second-order waves were applied to evaluate the effect of the nonlinear waves on wave run-up, and an artificial damping zone was adopted to reduce the amount of reflected and re-reflected waves from the sidewall of the NWT.Parametric studies were conducted to determine the effect of wavelength, wave steepness, and the draft of the cylinder on the wave run-up of the cylinder.The maximum wave run-up value occurred at 0°, which was in front of the cylinder, and the minimum value occurred near the circumferential angle of 135°.As the diffraction parameter increased, the wave run-up increased up to 1.7 times the wave height.Furthermore, the wave run-up was 4% higher than the linear wave when the wave steepness was 1/35.In particular, the crest height of the wave run-up increased by 8%.

Source: Journal of Ocean Engineering and Technology

DOI: 10.26748/ksoe.2020.026

Authors: Ho-Jin Jeong, Weoncheol Koo, Sung-Jae Kim

Institution: Inha University

Language: English

Topic: Fluid Dynamics Simulations and Interactions

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $300

Funders: Ministry of Trade, Industry and Energy, Korea Institute for Advancement of Technology