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

  • 제54권2호
  • /
  • Pages.83-89
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  • 2017
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  • 1225-1143(pISSN)
  • /
  • 2287-7355(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
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정렬 및 비정렬 격자를 이용한 선박 저항 계산에서 Courant 수의 공간 분포 및 LTS 기법의 효율성에 관한 연구

A Study on Spatial Distributions of Courant Number and Numerical Efficiency of LTS Method in Calculation of Ship Resistance Using Structured and Unstructured Meshes

  • 이상봉 (동아대학교 조선해양플랜트공학과) ;
  • 백광준 (인하대학교 조선해양공학과) ;
  • 박동우 (동명대학교 조선해양공학과)
  • Lee, Sang Bong (Department of Naval Architecture and Offshore Engineering, Dong-A University) ;
  • Paik, Kwang-Jun (Department of Naval Architecture and Ocean Engineering, Inha University) ;
  • Park, Dong Woo (Department of Naval Architecture & Ocean Engineering, Tongmyong University)
  • 투고 : 2016.08.22
  • 심사 : 2017.01.10
  • 발행 : 2017.04.20
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초록

Numerical simulations of ship resistance have been performed to compare spatial characteristics of Courant number when using structured and unstructured meshes. When Euler scheme was used for time integration, the structured mesh provided a more efficient calculation because the calculation time interval was larger than that of unstructured mesh. The automatic generation of very small meshes in the unstructured mesh was mainly responsible for the limitation of calculation time interval. When local time stepping Euler scheme was applied, however, the ship resistance of unstructured mesh showed a rapid convergence while a slow convergence of ship resistance in structured mesh was caused by the small time interval in bulbous bow.

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참고문헌

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