부방파제의 유동과 와의 생성 및 소멸에 관한 연구
A Study on Flow and Creation and Dissipation of Vorticity around Rectangular Floating Breakwater
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In this study, flow and creation and dissipation of vorticity around rectangular floating breakwater is investigated both experimentally and numerically. The PIV system(Particle image velocimetry) is employed to obtain the velocity field in the vorticity of rectangular structure. The numerical model, combined with turbulence model and the VOF method based on RANS equation, is used to analyze the turbulence structure. In the results of this study, the vorticity is found around conner of rectangular structure at all time domain, and creation and dissipation of vorticity are closely related to wave period. Separation points of phase of vortex due to flow separation for longer period waves are faster then for shorter period waves.
Abstract
In this study, flow and creation and dissipation of vorticity around rectangular floating breakwater is investigated both experimentally and numerically. The PIV system(Particle image velocimetry) is employed to obtain the velocity field in the vorticity of rectangular structure. The numerical model, combined with turbulence model and the VOF method based on RANS equation, is used to analyze the turbulence structure. In the results of this study, the vorticity is found around conner of rectangular structure at all time domain, and creation and dissipation of vorticity are closely related to wave period. Separation points of phase of vortex due to flow separation for longer period waves are faster then for shorter period waves.
참고문헌 (10)
- 윤종성, "부유식 방파제의 설치에 따른 유동 및 난류구조 해석", 대한토목학회 논문집B, 25(5B), pp.375~383 (2005), 대한토목학회
- 윤종성, "성층수역에서 저층의 빈산소수의 혼합 및 용승현상에 관한 연구(Ⅱ)", 대한토목학회지, 19(Ⅱ-5), pp.575~583 (1999)
- Chang,K.A., "Vortex Generation and Evolution in Water Waves Propagating over a Submerged Rectangular Obstacle Part I.Solitary Waves", Coastal Eng, 44, pp.13~36 (2001)
- Chang,K.A., "Vortex Generation and Evolution in Water Waves Propagating over a Submerged Rectangular Obstacle Part Ⅱ. Cnoidal Waves", Coastal Eng, 52, pp.257~283 (2005)
- Chen,H.C., "Time-domain Simulation of Barge Capsizing by a Chimera Domain Decomposition Approach", 12th International Offshore and Polar Engineering Conference, pp.314~321 (2002)
- Fugazza,M., "Energy Losses and Floating Breakwater Response", Journal of Waterway Port Coastal and Ocean Eng, 114(2), pp.191~205 (1988)
- Lin,P., "A Numerical Study of Breaking Waves in Surf Zone", J. Fluid Mech, 359, pp.239~264 (1998)
- Patel,V.C., "Turbulence Models for Near-wall and Low Reynolds Number Flows:A Review", AIAA J, 23(9), pp.1308~1319 (1985)
- Williams,A.N., "Dual Pontoon Floating Breakwater", Ocean Eng, 24, pp.465~478 (1997)
- Williams,A.N., "Floating Pontoon Breakwater", Ocean Eng, 27, pp.221~240 (2000)