2차원 연성모델을 적용한 불투과성 잠제 전면의 국부세굴 모의
Numerical Simulation of Local Scour in Front of Impermeable Submerged Breakwater Using 2-D Coupled Hydro-morphodynamic Model
2
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
In order to understand the characteristics of the topography change in front of an impermeable breakwater, a coupled model for a two-way analysis of the existing LES-WASS-2D and newly developed morphodynamic model was suggested. A comparison to existing experimental results revealed that the results computed using the 2-D hydro-morphodynamic model were in good agreement with the experimental results for the wave form, pore water pressure in the seabed, and topographical change in front of a submerged breakwater. It was shown that the two-way model suggested in this study is applicable to a morphological change in the seabed around a submerged breakwater. Then, using the numerical results, the topographical changes in front of an impermeable submerged breakwater were examined in relation to partial standing waves. Moreover, the characteristics of the local scour depths in front of them are also discussed in relation to incident wave conditions, sediment qualities, and submerged breakwater shapes.
Abstract
In order to understand the characteristics of the topography change in front of an impermeable breakwater, a coupled model for a two-way analysis of the existing LES-WASS-2D and newly developed morphodynamic model was suggested. A comparison to existing experimental results revealed that the results computed using the 2-D hydro-morphodynamic model were in good agreement with the experimental results for the wave form, pore water pressure in the seabed, and topographical change in front of a submerged breakwater. It was shown that the two-way model suggested in this study is applicable to a morphological change in the seabed around a submerged breakwater. Then, using the numerical results, the topographical changes in front of an impermeable submerged breakwater were examined in relation to partial standing waves. Moreover, the characteristics of the local scour depths in front of them are also discussed in relation to incident wave conditions, sediment qualities, and submerged breakwater shapes.
참고문헌 (36)
- Bagnold, R. A, "Experiments on a Gravity-Free Dispersion of Large Solid Spheres in a Newtonian Fluid under Shear", Proceedings of the Royal Society of London, 225, pp.49~63 (1954)
- Brackbill, J. U, "A Continuum Model for Modeling Surface Tension", Journal of Computational Physics, 100, pp.335~354 (1992)
- Carter, T. G, "Mass Transport by Waves and Offshore Sand Bedforms", Journal of the Waterways Harbors and Coastal Engineering Division, 99, pp.165~184 (1973)
- Cheng, N. S, "Formulas for Friction Factor in Transitional Regimes", Journal of Hydraulic Engineering, 134, pp.1357~1362 (2008)
- Cheng, N. S, "Modified Logarithmic Law for Velocity Distribution Subjected to Upward Seepage", Journal of Hydraulic Engineering, 124, pp.1235~1241 (1998)
- Effects of Heavy Sediment Concentration near the Bed on Velocity and Sediment Distribution. U. S, "Einstein, H. A", U.S. Army Engineer Division, 78~, pp.MRD Sediment Series, 8 (1955)
- An Assessment of Reservoir Mixing Process, "Ford D.E", U.S. Army Engineers Waterways Experiment Station, 147~, pp.Technical Report E-86-7 (1986)
- Germano, M, "A Dynamic Subgrid-Scale Eddy Viscosity Model", Physics of Fluids, 3, pp.1760~1765 (1991)
- Hsu, J. R. C, "Model Test Results of Scour along Breakwaters", Journal of Waterway, Port, Coastal and Ocean Engineering, 115, pp.66~85 (1989)
- Hughes, S. A, "Wave-Induced Scour Prediction at Vertical Walls", Procceding of Coastal Sediments ‘91, Seattle, 2, pp.1886~1900 (1991), ASCE
- 허동수, "사각격자체계 수치모델에서의 경사면 처리기법에 관하여", 대한토목학회 논문집B, 28(5B), pp.591~594 (2008), 대한토목학회
- Hur, D. S, "Effect of the Slope Gradient of Submerged Breakwaters on Wave Energy Dissipation", Engineering Applications of Computational Fluid Mechanics, 5, pp.83~98 (2011)
- 허동수, "불투과 잠제 전면에서 파랑 작용 하의 세굴 해석을 위한 수치모델의 개발", 대한토목학회 논문집B, 31(5), pp.483~489 (2011), 대한토목학회
- Lambe, T.W, "Soil Mechanics", pp.553~ (1969), John Wiley & Sons
- 이우동, "파랑-흐름의 상호작용 하에서 지형변동에 관한 3차원 연성 수치모델의 개발", 대한토목학회논문집(국문), 34(5), pp.1463~1476 (2014), 대한토목학회[DOI]
- 이우동, "정상흐름 하에서 스포일러 부착형 해저파이프라인의 자가매설 기구에 관한 수치해석", 한국해안·해양공학회논문집, 28(3), pp.146~159 (2016), 한국해안,해양공학회
- Lee, K.H, "Local Scour near a Vertical Submerged Breakwater and Development of Its Time Domain Analysis", Annual Journal of Coastal Engineering, 53, pp.501~505 (2006)
- Lee, K.H, "Experimental Study on Scour Occurring at a Vertical Impermeable Submerged Breakwater", Applied Ocean Research, 30, pp.92~99 (2008)
- Lesser, G. R, "Development and Validation of a Three-Dimensional Morphological Model", Coastal Engineering, 51, pp.883~915 (2004)
- Lilly, D. K, "A Proposed Modification of the Germano Subgrid-Scale Closure Method", Physics of Fluids, 4, pp.633~635 (1992)
- Losada, I. J, "Effects of Reflective Vertical Structures Permeability on Random Wave Kinematics", Journal of Waterway, Port, Coastal and Ocean Engineering, 123, pp.347~353 (1997)
- Roulund, A, "Numerical and Experimental Investigation of Flow and Scour around a Aircular Pile", Journal of Fluid Mechanics, 534, pp.351~401 (2005)
- Silvester, R, "Handbook of Coastal and Ocean Engineering, 2", pp.959~996 (1990)
- Silvester, R, "Sines Revisited", Journal of Waterway, Port, Coastal and Ocean Engineering, 115, pp.327~344 (1989)
- Smagorinsky, J, "General Circulation Experiments with the Primitive Equation", Monthly Weather Review, 91(3), pp.99~164 (1963)
- Soulsby, R. L, "Dynamics of Marine Sands", pp.249~ (1997), Thomas Relford Publications
- Soulsby, R. L, "Threshold of Sediment Motion in Coastal Environments", Pacific Coasts and Ports '97: Proceedings of the 13th Australasian Coastal and Ocean Engineering Conference and the 6th Australasian Port and Harbour Conference, 1, pp.149~154 (1997)
- Sutherland, J, "Wave Phase Shift at Coastal Structures", Journal of Waterway, Port, Coastal, and Ocean Engineering, 124, pp.90~98 (1998)
- Sumer, B. M, "Scour at the Head of a Vertical-Wall Breakwater", Coastal Engineering, 29, pp.201~230 (1997)
- Sumer, B. M, "Experimental Study of 2D Scour and Its Protection at a Rubble-Mound Breakwater", Coastal Engineering, 40, pp.59~87 (2000)
- Sumer, B.M, "The Mechanics of Scour in the Marine Environment. World Scientific", Advaned Series on Ocean Eingineering, 17, pp.519~ (2002)
- van Rijn, L. C, "Sediment Transport, Part I : Bed Load Transport", Journal of Hydraulic Engineering, 110, pp.1431~1456 (1984)
- van Rijn, L. C, "Sediment Transport, Part II : Suspended Load Transport", Journal of Hydraulic Engineering, 110, pp.1613~1641 (1984)
- Modelling of Sand Transport in DELFT3D, "van Rijn, L. C", Delft University of Technology, ~, pp.WL|Delft Delft Hydraulics Report Z3624 (2003)
- Xie, S.L, "Scouring Patterns in Front of Vertical Breakwaters and Their Influences on the Stability of the Foundation of the Breakwaters. Report", Department of Civil Engingeering, pp.1981
- Xiong, Y, "Coupling Sediment Transport and Water Quality Models", Ph.D, pp.2010