Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Numerical Simulation of Body Motion Using a Composite Grid System

중첩 격자계를 이용한 물체운동의 수치 시뮬레이션

  • 박종천 (부산대학교 조선해양공학과) ;
  • 전호환 (부산대학교 조선해양공학과) ;
  • 송기종 (현대중공업 선박해양연구소)
  • Published : 2003.10.01
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Abstract

A CFD simulation technique has been developed to handle the unsteady body motion with large amplitude by use of overlapping multi-block grid system. The three-dimensional, viscous and incompressible flow around body is investigated by solving the Navier-Stokes equations, and the motion of body is represented by moving effect of the grid system. Composite grid system is employed in order to deal with both the body motion with large amplitude and the condition of numerical wave maker in convenience at the same time. The governing equations, Navier-Stokes (N-S) and continuity equations, are discretized by a finite volume method, in the framework of an O-H type boundary-fitted grid system (inner grid system including test model) and a rectangular grid system (outer grid system including simulation equipments for generation of wave environments). If this study, several flow configurations, such as an oscillating cylinder with large KC number, are studied in order to predict and evaluate the hydrodynamic forces. Furthermore, the motion simulation of a Series 60 model advancing in a uniform flow under the condition of enforced roll motion of angle 20$^{\circ}$ is performed in the developed numerical wave tank.

Keywords

References

  1. 김우전, 김도현, 반석호 2000, “유한체적법을 이용한 상선주위의 난류유동 계산에 관한 연구”, 대한조선학회논문집, Vol.37-4, pp.19-30.
  2. Chan, R.K.C. and Street, R.L. (1970), “A Computer Study of Finite Amplitude Water Waves", J. of Computational Physics, Vol. 6, pp 68-9. https://doi.org/10.1016/0021-9991(70)90005-7
  3. Germano, M., Piomelli, U., Moin, P. & Cabot, W.H. (1991), “A dynamic subgrid-scale eddy viscosity model”, Phys. Fluids, A Vol. 3, pp 1760-1765. https://doi.org/10.1063/1.857955
  4. Hino, T. 1997, “An unstructed grid method for incompressible viscous flows with a free surface“, AIAA-97-0862,.
  5. Justesen, P. 1991, “A numerical study of oscillating flow around a circular cylinder”, J. of Fluid Mech., Vol.222, pp.157-196.
  6. Miyata, H., Nishimura, S. & Masuko, A. 1985, “Finite-difference simulation of nonlinear waves generated by ship of arbitrary three- dimensional configuration”, J. of Computational Physics, Vol.60- 3, pp.391-436. https://doi.org/10.1016/0021-9991(85)90028-2
  7. Miyata, H. & Park, J.C. 1995, “Ch. 5 Wave Breaking Simulation”, Advances in Fluid Mechanics, Potential flow of fluids, edited by M. Rahman, Computational mechanics publications, pp.149-175.
  8. Obasaju, E.D., et al. 1988, “A study of forces, circulation and vortex patterns around a circular cylinder in oscillating flow”, J. of Fluid Mech., Vol. 196, pp.467-494. https://doi.org/10.1017/S0022112088002782
  9. Park, J.C., Kim, M.H. & Miyata, H. 1999, “Fully Nonlinear Free-Surface Simulations By a 3D Viscous Numerical Wave Tank”, Int. J. for Numerical Methods in Fluids, Vol. 29, pp.685-703. https://doi.org/10.1002/(SICI)1097-0363(19990330)29:6<685::AID-FLD807>3.0.CO;2-D
  10. Park, J.-C., Miyata, H., Ooga, T. & Gotoda, K. 2001, “Motion Simulation of a Sailing Boat in Oblique Waves with Three Degrees of Freedom”, J. Society of Naval Architects Japan, vol.190, pp.191-199. (Japanese)
  11. Sun, X. & Dalton, C. 1996, “Application of the LES method to the oscillating flow past a circular cylinder”, J. of Fluids and Structures, Vol.10, pp.851-872. https://doi.org/10.1006/jfls.1996.0056
  12. Tahara, Y. 1999, “Wave Influences on Viscous Flow around a Ship in Steady Yaw Motion”, J. Society of Naval Architects Japan, vol.186, pp.157-168.

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