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

  • 제27권4호
  • /
  • Pages.238-245
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  • 2015
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  • 1976-8192(pISSN)
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  • 2288-2227(eISSN)
한국해안·해양공학회 (Korean Society of Coastal and Ocean Engineers)
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위상을 포함한 다방향 불규칙파 조건에서의 이안류 수치모의

Numerical Simulations of Rip Currents Under Phase-Resolved Directional Random Wave Conditions

  • 최준우 (한국건설기술연구원 해안연구실험실)
  • Choi, Junwoo (Coastal Research Laboratory, Korea Inst. of Civil Eng. & Building Tech.)
  • 투고 : 2015.07.14
  • 심사 : 2015.08.21
  • 발행 : 2015.08.31
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초록

Choi et al.(2015)은 최근 Boussinesq 방정식 모형인 FUNWAVE를 이용하여, 다방향 불규칙파 조건으로 SandyDuck 현장실험 조건의 연안흐름을 수치모의하여, 연안류 유속분포 뿐만 아니라 전단파동 등의 계산결과가 관측결과와 잘 일치함을 보였다. 이 연구모형을 기반으로 SandyDuck 지형과 더불어 다방향 위상의 상호작용에 의해 발생되는 연안방향의 파에너지 비균등성이 이안류 발달에 미치는 영향을 고찰하기 위해 수치모의를 수행하였다. 이 결과 지형에 의해 발생하는 이안류가 지배적인 규칙파 조건과 달리 다방향 불규칙파 위상의 상호작용에 따른 돌발적 이안류의 발생이 추가되어 매우 복잡한 쇄파대의 연안 순환흐름을 재현함을 알 수 있었다.

Recently, Choi et al.(2015) showed that a numerical simulation of the SandyDuck experiment under a directional random wave environment agreed well with the experimental data including the wave height distribution of the random waves, the well-developed longshore current and its energetic fluctuation. Based on the Boussinesq modeling, this study investigates the effect of the alongshore variations, which are induced by not only the field topography but also the phase interaction of multidirectional random waves in the surf zone wave field, on the rip currents. As a result, transient rip currents as well as topographical rip currents cause the complicated surfzone circulation and mixing process due to their interactions in a multi-directional random wave condition while the topographical rip currents are dominant in a monochromatic wave condition.

키워드

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피인용 문헌

  1. Characteristics of Wave-induced Currents using the SWASH Model in Haeundae Beach vol.27, pp.6, 2015, https://doi.org/10.9765/KSCOE.2015.27.6.382
  2. Rip Current Sensitive Analysis Using Rose Diagram for Wave-Induced Current Vectors at Haeundae Beach, Korea vol.30, pp.4, 2016, https://doi.org/10.5574/KSOE.2016.30.4.320
  3. Numerical Study on Rip Current Likelihood according to the Beach Nourishment in the Haeundae Coast vol.15, pp.5, 2015, https://doi.org/10.9798/KOSHAM.2015.15.5.239