CFD-DEM 연계기법을 활용한 고정식 해양구조물의 모노파일 주위 유동 및 세굴해석
Flow and Scour Analysis Around Monopole of Fixed Offshore Platform Using Method that Couples Computational Fluid Dynamics and Discrete Element Method
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When an offshore foundation is exposed to waves and currents, local scour could develop around a pile and even lead to structural failure. Therefore, understanding and predicting the scour due to sediment transport around foundations are important in the engineering design. In this study, the flow and scour around a monopole foundation exposed to a current were investigated using a method that coupled the computational fluid dynamics (CFD) and discrete element method (DEM). The open source computation fluid dynamics library OpenFOAM and a sediment transport library were coupled in the OpenFOAM platform. The incipient motion of the particle was validated. The flow fields and sediment transport around the monopole were simulated. The scour depth development was simulated and compared with existing experimental data. For the upstream scour hole, the equilibrium scour depth could be reproduced qualitatively, and it was underestimated by about 23%.
Abstract
When an offshore foundation is exposed to waves and currents, local scour could develop around a pile and even lead to structural failure. Therefore, understanding and predicting the scour due to sediment transport around foundations are important in the engineering design. In this study, the flow and scour around a monopole foundation exposed to a current were investigated using a method that coupled the computational fluid dynamics (CFD) and discrete element method (DEM). The open source computation fluid dynamics library OpenFOAM and a sediment transport library were coupled in the OpenFOAM platform. The incipient motion of the particle was validated. The flow fields and sediment transport around the monopole were simulated. The scour depth development was simulated and compared with existing experimental data. For the upstream scour hole, the equilibrium scour depth could be reproduced qualitatively, and it was underestimated by about 23%.
참고문헌 (21)
- Ali, S. Z., "Origin of the Scaling Laws of Sediment Transport", Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 473(2197) (2017)
- Anderson, T., "A Fluid Mechanical Description of Fluidized Beds: Equations of Motion", Industrial & Engineering Chemistry Fundamentals, 6(4), pp.527~539 (1967)
- Baykal, C., "Numerical Simulation of Scour and Backfilling Processes around a Circular Pile in Waves", Coastal Engineering, 122, pp.87~107 (2017)
- Cundall, P. A., "A Discrete Numerical Model for Granular Assemblies", Geotechnique, 29(1), pp.47~65 (1979)
- Dargahi, B., "The Turbulent Flow Field around a Circular Cylinder", Experiments in Fluids, 8(1-2), pp.1~12 (1989)[DOI]
- Goniva, C., "Influence of Rolling Friction on Single Spout Fluidized Bed Simulation", Particuology, 10(5), pp.582~591 (2012)[DOI]
- 허동수, "불투과 잠제 전면에서 파랑 작용 하의 세굴 해석을 위한 수치모델의 개발", 대한토목학회 논문집B, 31(5), pp.483~489 (2011), 대한토목학회
- Kloss, C., "Models, Algorithms and Validation for Opensource DEM and CFD–DEM", Progress in Computational Fluid Dynamics, an International Journal, 12(2-3), pp.140~152 (2012)
- Koch, D. L., "Inertial Effects in Suspension and Porous-media Flows", Annual Review of Fluid Mechanics, 33(1), pp.619~647 (2001)[DOI]
- Li, J., "CFD-DEM Two-Way Coupled Numerical Simulation of Bridge Local Scour Behavior under Clear-Water Conditions", Transportation Research Board 97th Annual Meeting (2018)
- 임병구, "프랙탈 이론의 소하천 점착성 유사 적용에 관한 연구", 한국수자원학회 논문집, 49(10), pp.887~901 (2016), 한국수자원학회
- Pang, A. L. J., "A Numerical Approach for Determining Equilibrium Scour Depth around a Mono-pile Due to Steady Currents", Applied Ocean Research, 57, pp.114~124 (2016)[DOI]
- 박선호, "파라미터 변화에 따른 석션버켓기초에 발생하는 세굴현상에 대한 수치해석 연구", 한국해양공학회지, 31(4), pp.281~287 (2017), 한국해양공학회
- Roulund, A., "Numerical and Experimental Investigation of Flow and Scour around a Circular Pile", Journal of Fluid Mechanics, 534, pp.351~401 (2005)[DOI]
- Schmeeckle, M. W., "Numerical Simulation of Turbulence and Sediment Transport of Medium Sand", Journal of Geophysical Research : Earth Surface, 119(6), pp.1240~1262 (2014)[DOI]
- Sumer, B. M., "The Mechanics of Scour in the Marine Environment", pp.17~ (2002), World Scientific Publishing Company
- Sun, R., "CFD–DEM Simulations of Current-induced Dune Formation and Morphological Evolution", Advances in Water Resources, 92, pp.228~239 (2016)[DOI]
- Trygsland, E., "Numerical Study of Seabed Boundary Layer Flow around Monopile and Gravity-based Wind Turbine Foundations", Master, pp.2015
- Whitehouse, R., "Scour at Marine Structures: A Manual for Practical Applications" (1998), Thomas Telford
- Xu, S. L., "Study of Sedimentation of Non-cohesive Particles via CFD–DEM Simulations", Granular Matter, 20(1), pp.4~ (2018)[DOI]
- Yang, J., "Numerical Simulation of Scour around a Submarine Pipeline Using Computational Fluid Dynamics and Discrete Element Method", Applied Mathematical Modelling, 55, pp.400~416 (2018)[DOI]