A Fundamental Study for the Numerical Simulation Method of Green Water Occurrence on Bow Deck

Abstract

Green water load is an important parameter to be considered in designing a modern ship or offshore structures like FPSO and FSRU. In this research, a numerical simulation method for green water phenomenon is introduced. The Navier-Stokes equations and the continuity equation are used as governing equations. The equations are calculated using Finite Difference Method(FDM) in rectangular staggered grid system. To increase the numerical accuracy near the body, the Cartesian cut cell method is employed. The nonlinear free-surface during green water incident is defined by Marker-density method. The green waters on a box in regular waves are simulated. The simulation results are compared with other experimental and computational results for verification. To check the applicability to moving ship, the green water of the ship which is towed by uniform force in regular wave, is simulated. The ship is set free to heave and to surge.

Improvement in Resistance Performance of a Medium-Sized Passenger Ship with Variation of Bulbous Bow Shape

“…(Yu, et al, 2013). 저항성능은 수정된 밀도함수법(modified marker-density method)을 이용하여 작성된 전산프로그램으로 선체 주위 유동에 대한 수치시뮬레이션 (Lee, 2008;Jeong, et al, 2010) Table 4 Bulb parameters of the gooseneck bulb hull varied with breadth Table 5 Bulb parameters of the gooseneck bulb hull varied with hight and length 이 논문은 인하대학교의 지원에 의하여 연구되었음.…”

Experimental and Numerical Study on the Effects of Bow Deck Shape on the Green Water

“…그러나 Lloyd, et al (1985)는 불규칙파 중 실험을 통하여 선 수 플레어가 갑판침입수에 미치는 영향이 작다고 결론을 내렸다. Buchner (1995) Coordinate systems for moving domain (Jeong, et al, 2010) …”

Computation of the Green Water Design Impact Loads Acting on the Box-Type Structure of a High-Speed Ship's Bow

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Green water와 관련한 다양한 연구들 (Mizoguchi, 1988;Buchner, 1995Buchner, , 1996Kim & Kim, 1996;Pekken, et al, 1999;Kim & Shin, 2005;Pham & Varyani, 2005;Jeong, et al, 2010;Lee, et al, 2012;Ha, et al, 2012;Jeong, et al, 2013) In rough seas, green water shipped on board may impose quite large impact loads on the structures on deck and sometimes result in structure damages. One of the essential tasks of the naval fluid engineers is to provide the design impact loads which are needed for proper design of the structure strength against the green water impacts.

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