한국해안·해양공학회논문집 (Journal of Korean Society of Coastal and Ocean Engineers)

  • 제20권4호
  • /
  • Pages.363-371
  • /
  • 2008
  • /
  • 1976-8192(pISSN)
  • /
  • 2288-2227(eISSN)
한국해안·해양공학회 (Korean Society of Coastal and Ocean Engineers)
권호 표지

투과성잠제 주변의 파동장 해석을 위한 2-D 및 3-D 수치계산의 비교

On Comparison between 2-D and 3-D Numerical Models used to Analyze the Wave Field around a Permeable Submerged Breakwater

  • 허동수 (경상대학교 토목환경공학부 해양산업연구소) ;
  • 최동석 (경상대학교 토목환경공학부) ;
  • 이우동 (경상대학교 토목환경공학부) ;
  • 염경선 (나고야대학교 공학연구과 사회기반공학)
  • Hur, Dong-Soo (Institute of marine industry, Department of Civil and Environment Engineering, Gyeongsang National University) ;
  • Choi, Dong-Seok (Department of Civil and Environment Engineering, Gyeongsang National University) ;
  • Lee, Woo-Dong (Department of Civil and Environment Engineering, Gyeongsang National University) ;
  • Yeom, Gyeong-Seon (Department of Civil Engineering, Nagoya University)
  • 발행 : 2008.08.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

본 연구에서는 투과성잠제 주변의 파동장 해석을 위한 2-D 수치해석기법과 3-D 수치해석기법에 의한 결과를 비교하기 위하여 투과성구조물에 의한 유체저항(관성저항, 층류저항 및 난류저항)을 고려할 수 있는 수치해석기법을 이용하고, 난류모델로서 LES 모델을 도입하여 기존에 수행되었던 수리모형실험과의 비교를 통하여 검증하였다. 수치해석결과로부터 투과성잠제의 배후에서 2-D해석에 의한 결과가 3-D해석의 경우보다 높은 파고분포를 나타내었으며, 잠제 주변의 평균류에 대해서도 비교, 논의하였다.

The aim of this study is to compare the numerical results obtained by 2-D and 3-D models which are used to examine the wave field around a permeable submerged breakwater. At first, the numerical model, which is able to consider the flow through a porous medium with inertial, laminar and turbulent resistance terms and determine the eddy viscosity with LES turbulent model, is used and validated by comparing with existing experimental data. And then, the numerical test on the wave field around a permeable submerged breakwater is performed. It is revealed from the numerical results that, at the onshore side of the submerged breakwater, the wave height by 2-D analysis is higher than that by 3-D analysis. Also, the time-averaged mean flow around a submerged breakwater is discussed in detail.

키워드

참고문헌

  1. 김도삼, 이광호, 김정수 (2002). 수중투과성구조물에 의한 쇄파를 수반한 파랑변형 및 유속장 해석. 한국해안.해양공학회지, 14(2), 171-181
  2. 조용식, 정우창 (2003). 2차원 유한요소법을 이용한 불투과성 사각형 수중방파제의 Bragg 반사 해석. 한국수자원학회논문집, 36(3), 447-454
  3. 조원철 (2004). 폭 변화에 따른 잠제의 파랑 차단 성능. 한국해안.해양공학회지, 16(4), 206-212
  4. 허동수, 이우동 (2007). 잠제주변의 파고분포 및 흐름의 3차원 특성; PART I- 해빈이 없는 경우. 대한토목학회논문집, 27(6B), 689-701
  5. 허동수, 최동석 (2008). 투과성 잠제의 비탈면경사가 주변파동장에 미치는 영향. 대한토목학회논문집, 28(2B), 249-259
  6. 壹岡 涉, 甲斐宏典, 平岡愼司 (1994). 透水層上の長波方程式 と透過潛堤への適用性について. 日本海岸工學論文集, 41, 711-715
  7. Christensen, E.D. and Deigaard, R. (2001). Large eddy simulation of breaking waves. Coastal Eng., 42, 53-86 https://doi.org/10.1016/S0378-3839(00)00049-1
  8. Ergun, S. (1952). Fluid flow through packed columns. Chemical Eng., 48(2), 89-94
  9. Garcia, N., Lara J.L. and Losada I.J. (2004). 2-D numerical analysis of near-field flow at low-crested permeable breakwaters. Coastal Eng., 51, 991-1020 https://doi.org/10.1016/j.coastaleng.2004.07.017
  10. Hirt, C.W. and Nichols B.D. (1981). Volume of field (VOF) method for the dynamics of free boundaries. Coastal. Eng., 39, 201-255
  11. Hsu, T.W., Hsieh, C.M. and Hwang, R.R. (2004). Using RANS to simulate vortex generation and dissipation around impermeable submerged double breakwaters. Coastal Eng., 51, 557-579 https://doi.org/10.1016/j.coastaleng.2004.06.003
  12. Hur, D.S. (2004). Deformation of multi-directional random waves passing over an impermeable submerged breakwater installed on a sloping bed. Ocean Eng., 31, 1295-1311 https://doi.org/10.1016/j.oceaneng.2003.12.005
  13. Hur, D.S., Kim, C.H., Kim, D.S. and Yoon, J.S. (2008). Simulation of the nonlinear dynamic interactions between waves, a submerged breakwater and the seabed. Ocean Eng., 35, 511-522 https://doi.org/10.1016/j.oceaneng.2007.12.002
  14. Kramer, M., Zanuttigh, B., von der Meer, J.W., Vidal, C. and Gironella, F.X. (2005). Laboratory experiments on low-crested breakwaters, Coastal Eng., 52, 867-885 https://doi.org/10.1016/j.coastaleng.2005.09.002
  15. Liu, S. and Jacob, H.M. (1999). Non-linear flows porous media. J. Non-Newtonian Fluid Mech., 86, 229-252 https://doi.org/10.1016/S0377-0257(98)00210-9
  16. Okayasu, A., suzuki, T. and Matsubayashi, Y. (2005). Laboratory experiment and three-dimensional large eddy simulation of wave overtopping on gentle slope seawalls. Coastal Eng., 47, 71-89 https://doi.org/10.1142/S0578563405001215
  17. Sakakiyama, T. and Kajima, R. (1992). Numerical simulation of nonlinear wave interacting with permeable breakwater. Proc. 23rd Int. Conf. Coastal Eng., ASCE, Venice, 1517-1530
  18. Schumann, U. (1987). Direct and large eddy simulation of turbulence-summary of the state of the art 1987. Lecture Series 1987-2006, Introduction to the Modeling of turbulence, Von Karman Institute for Fluid Dynamics CRhode Saint Genese, Belgium, 1-36
  19. Smagorinsky, J. (1963). General circulation experiments with the primitive equation. Monthly Weather Review, 91(3), 99-164 https://doi.org/10.1175/1520-0493(1963)091<0099:GCEWTP>2.3.CO;2