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

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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Numerical Simulation of Ship-induced Wave Using FLOW-$3D^{(R)}$

FLOW-$3D^{(R)}$를 이용한 항주파 수치모의

  • Published : 2008.06.30
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Abstract

Using the commercial CFD code FLOW-$3D^{(R)}$ which has an implicit General Moving Object (GMO) method, the ship-induced wave has been simulated. In the implicit GMO method of the FLOW-$3D^{(R)}$, a rigid body's motion which is either user-prescribed (prescribed motion) or dynamically coupled to fluid flow (coupled motion) can be computed with six degrees of freedom (DOF). The simulated horizontal wave patterns are agree with the wave patterns represented by depth Froude number. The model has been well-simulated to generate the depth-dependent wave transformation in comparison of uniform depth case to complicated depth case. Additionally, it shows that ship-induced waves have been reasonably generated by two ships passing each other and by a ship moving in a curve. Therefore, it is suggested that the FLOW-$3D^{(R)}$ model calibrated with observed data should provide more accurate prediction for the ship-induced wave in a certain fairway or harbor.

대표적인 상용 CFD 코드 중 하나인 FLOW-$3D^{(R)}$에 포함된 강체에 대한 6-자유도 운동을 적용한 음해법의 GMO 방법을 이용하여 항주파의 재현 가능성을 살펴보았다. 모델에 의한 항주파의 형상 재현시 depth Froude number에 따른 수평 파형이 잘 재현되었으며, 선박의 직선항로 항행시 일정한 수심인 경우와 실제 수심인 경우를 비교함으로써 모델이 수심에 따른 파형의 변화를 잘 재현함을 알 수 있었다. 또한, 모델에 의해 실제 수심조건에서 두 척의 선박이 교차 진행할 경우와 선박이 곡선항로를 항행할 경우에 대한 항주파를 잘 재현할 수 있음을 보였다. 따라서, FLOW-$3D^{(R)}$를 이용하여 항주파를 수치모의할 경우 관측을 통한 모델의 검 보정을 통해 항로와 항구에서의 항주파를 보다 정확하게 예측할 수 있을 것으로 판단된다.

Keywords

References

  1. 강성진, 김선규, 손창배, 김종성, 홍정혁, 김창제(2007). 항 주파고의 특성에 관한 연구. 한국항해항만학회지, 제31 권, 제5호, pp.339-344 https://doi.org/10.5394/KINPR.2007.31.5.339
  2. 신승호, 정대득(2003). 비선형분산파랑모형을 이용한 항주파 의 발생과 전파에 관한 수치예측모형 개발. 한국항해항만학회지, 제27권, 제5호, pp.527-537
  3. 이화영, 권세영, 오병철, 전인식(2003). 항내 항주파 계산을 위한 수치모의. 한국해안해양공학발표논문집, 제14권, pp.270-275
  4. 한태영(2004). 선박운항에 따른 항주파 영향 및 저감 방안 에 관한 연구. 연세대학교 공학대학원 석사학위논문
  5. 運輸省港灣局監修(1999), 港灣の施設の技術上の基準.同解說 (上.下). (社)日本港灣協會, pp.132-138
  6. Dam, Khanh Toan, Katsutoshi Tanimoto, Ba Thuy Nguyen, Yoshiyuki Akagawa (2006). Nmuerical study of propagation of ship waves on a sloping coast. Ocean Engineering, vol. 33, pp.350-364 https://doi.org/10.1016/j.oceaneng.2005.05.003
  7. de Vries, S. (2007). On the Generation of Surfable Ship Waves in a Circular Pool, part II. Delft University of Technology, M.Sc. Thesis
  8. Goldstein, H., Charles, P. and Safko, J. (2002). Classical Mechanics. Addison Wesley, Washington
  9. Havelock, T.H. (1908). The propagation of groups of waves in dispersive media, with application to waves on water produced by a travelling disturbance, Proc. Royal Society, London, Series A, Vol. 81, No. 549, pp. 398-430
  10. Hirt, C.W. and Nichols, B.D. (1981). Volume of Fluid (VOF) method for the dynamics of free boundaries. J. Comp. Physics, vol. 39, pp.201-225 https://doi.org/10.1016/0021-9991(81)90145-5
  11. Hirt, C.W. and Sicilian, J.M. (1985). A porosity technique for the definition obstacles in rectangular cell meshes. Flow Science, Inc., FloSci-Bib3-85
  12. Hirt, C.W. and Richardson, J.E. (1999). The modelling of shallow flows. Flow Science, Inc., Technical Notes, FSI- 99-TN48R
  13. Hirt, C.W. (1999). Addition on wave transmitting boundary conditions to the FLOW-3D program. Flow Science, Inc., Technical Notes, FSI-99-TN49
  14. Jiang, Tao, Rupert Henn, Som Deo Sharma (2002). Wash Waves Generated by Ships Moving on Fairways of Varying Topography. 24th Symposium on Naval Hydrodynamics, Fukuoka, JAPAN
  15. Johnson, J.W. (1958). Ship Waves in Navigation Channels, Proceedings Sixth Conference on Coastal Engineering, Chap. 40, Berkely, California, pp. 666-690
  16. Nwogu, Okey (2007). Numerical Modeling of Waves Generated by High-Speed Vessel in Shallow Water with a Coupled Boussinesq-Panel Method. 9th international Conference on Nymerical Ship Hydrodynamics, Ann Arbor, Michigan
  17. Richardson, J.E. (1996). Surf similarity. Flow Science, Inc., Technical Notes, FSI-96-00-TN44
  18. Wei, Gengsheng (2005a). A fixed-mesh method for general moving objects. Flow Science, Inc., Technical Notes, FSI- 05-TN73
  19. Wei, Gengsheng (2005b). An implicit method to solve problems of rigid body motion coupled with fluid flow. Science, Inc., Technical Notes, FSI-05-TN76