KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Three-Dimensional Flow Characteristics and Wave Height Distribution around Permeable Submerged Breakwaters; PART II - with Beach

잠제 주변의 파고분포 및 흐름의 3차원 특성; PART II-해빈이 있을 경우

  • 허동수 (국립경상대학교 토목환경공학부(해양산업연구소)) ;
  • 이우동 (국립경상대학교 대학원 해양토목공학과)
  • Received : 2007.09.27
  • Accepted : 2007.12.04
  • Published : 2008.01.31
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Abstract

In the present study, a three dimensional hydrodynamic characteristics around the fully submerged dual breakwaters with a sand beach has been investigated numerically using a 3-D numerical scheme, which can determine the eddy viscosity with LES turbulence model and is able to consider wave-structure-seabed interaction in 3-dimensional wave field (LES-WASS-3D), recently developed by Hur and Lee (2007). Based on the numerical experiments, strong vortices can be generated fore and aft edges of the structures, and propagate lee sides. Thus relatively large circulation flows are occurred around submerged breakwaters. The 3-D flow hydrodynamic characteristics have been examined by mean flows and mean vortices for various x-y, x-z sections and y-z layers. Wave height distribution and wave set-up around and over submerged breakwaters, and breaking point migration toward shore side is discussed in detail.

본 연구에서는 파 잠제 해빈의 상호간섭에 의한 파동장 및 흐름장의 변화를 검토하기 위하여, 2기의 잠제와 모래해빈을 설치한 경우를 대상으로 허와 이(2007)에 의해 개발된 모델(LES-WASS-3D)을 이용하여 잠제 주변의 3차원적 흐름특성과 파고분포에 대해 고찰하였다. 그 결과, 잠제단부를 중심으로 회전하는 순환류를 확인할 수 있었으며, 여러 단면의 평균류 및 평균와도를 검토함으로서 잠제주변의 3차원 흐름특성을 고찰하였다. 아울러 잠제 천단상의 쇄파점분포, 잠제주변의 파고분포 및 wave set-up에 대해서도 논의하였다.

Keywords

References

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