Journal of Korean Society of Coastal and Ocean Engineers (한국해안해양공학회지)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
권호 표지

Application of Boundary-Fitted Coordinate System to the Wave Propation in a Circular Channel

만곡 수로에서의 파랑 전파 예측을 위한 경계 고정 좌표계의 적용

  • Jung Lyul Lee (Department of Civil and Environmental Engineering, Sungkyunkwan University)
  • Published : 1998.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

The paper deals with the application of Boundary-Fitted Coordinate System (BFCS) to the two wave models of parabolic and hyperbolic types developed on a rectangular grid system. Since the BFCS conforms the boundaries of the region in such wary that boundary conditions or calculation process can be accurately represented, improvement in predicting the wave fields can be achieved. The numerical results show a good agreement with the analytical results for either waves propagating or reflecting along a circular channel of constant depth. Simulation of reflecting waves in a parabolic wave model is accomplished by the backward calculation as if waves approached at the cross wall take a turn in the opposite direction and propagate against a channel.

본 논문은 경계처리 및 계산과정에 있어서 좀더 개선된 파랑 예측이 보장되도록 기존의 정방형 좌표계에서 수립된 포물선형 및 쌍곡선형 파랑 모델을 경계고정좌표계에 적용하였다. 일정 수심의 만곡 수로를 따라 진행 및 반사하는 파랑에 대한 이론해와 비교하여 수치 모델 결과는 모두 만족할만하였다. 포물선형 모델의 반사 파랑 모의는 반사물에 접근한 입사파를 다시 외해 경계 쪽으로 역계산하여 수행된다.

Keywords

References

  1. Proc. 13th Int. Conf. Coastal Engrg. Computation of combined refraction-diffraction Berkhoff, J.C.W.
  2. Symp. on Numerical Generation of Curvilinear Coordinate systems Use in the Nemerical Solution of Paritial Differential Equations Generation of boundary-fitted coordinate systems using segmented computational regions Coleman, R.M.
  3. Coastal Eng. v.9 A practical altemative to the mild slope wave equation Copeland,G.J.M.
  4. Proc. 24th Int. Conf. Coastal Engrg. Waves in an annular entrance channel Dalrymple, R.A.;Kirby, J.T.
  5. J. Fluid Mech v.201 Models for very wide-angle water and wave diffraction. PArt 2. Irregular bathmetry Dalrymple, R.A.;Suh, K.D.;Kirby, J.T.;Chae, J.W.
  6. Tech. Rep. CERE-86-4 Regional coastal processes numerical modeling system, Report 1, RCPWAVE-A linear wave propagation model for engineering use Ebersole, B.A.;Cialone, M.A.;Pater, M.D.
  7. J. Waterway, Port, Coastal and Ocean Engrg. v.114 Parabolic wave computation in nonorthogonal coordinate systems Kirby, J.T.
  8. Abstracts of Papers for Annual Meeting of Korean Society of Coastal and Ocean Engineers v.6 Wave Prediction in habour by using parabolic-type numerical schme Lee, J.L.;Lee, D.Y.
  9. J. Waveway, Port, Coastal and Ocean Engrg. v.114 Wave propagation between two breakwaters Liu P.L.-F.;Boissevain, P.L.
  10. Coastal Eng. v.11 An effcient finite-differenct approach to the mild-slope equation Madsen, P.A.;Larsen, J.
  11. J. Waterway, Port, Coastal and Ocean Engrg. v.124 no.1 Wave propagation in cirular jettied channels Melo, E.;Gobbi, M.F.
  12. Coastal Eng. v.12 Combined refactiondiffraction of short-waves in large coastal regions Panchang, V.G.;Cushman-Roisin, B.;Prarce, B.R.
  13. J. Fuuid Mech. v.95 On the parabolic equation for water-wave propagation Radder, A.C.
  14. J. Comp. Phys. v.15 Automatioc numerical generation of body-fitted curvilinear coordinate system for field containing any number of arbitrary two-dimensional bodies Thomson, J.F.;Thames, F.C.;Mastin, C.W.
  15. Proc. 20th Int. Conf. Coastal Engrg. Mthematical modeling of wave-induced nearshore cirulations Yoo, D.;O'Commor, B.A.