FDS-HCIB법을 이용한 고립파에 의한 물체 운동 모사

• Published in: 大韓造船學會 論文集 Vol. 51; no. 4; pp. 265 - 273
• Main Authors: 신상묵(Sangmook Shin), 김인철(In Chul Kim), 김용직(Yong Jig Kim)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2014
• Subjects: 조선공학; Wave force(파력); Non-boundary conforming(경계 비정합); Free surface capturing(자유표면 포착); Wave-body interaction(물체-파 상호작용); Body motion(물체 운동); -
• ISSN: 1225-1143; 2287-7355

Wave-body interaction is simulated using a developed code based on the flux-difference splitting scheme for immiscible and incompressible fluids and the hybrid Cartesian/immersed boundary method. A free surface is captured as a moving contact discontinuity within a fluid domain and an approximated Riemann solver is used to estimate the inviscid flux across the discontinuity. Immersed boundary nodes are identified inside an instantaneous fluid domain near a moving body, then dependent variables are reconstructed at those immersed boundary nodes based on interpolation along local normal lines to the boundary. Free surface flows around an oscillating cylinder are simulated and the computed wave elevations are compared with other reported results. The generation of a solitary wave by a moving wave-maker is simulated and the time histories of wave elevations at two different points are compared with other results. The developed code is applied to simulate body motion of an elastically mounted circular cylinder as a solitary wave passes the body. The force acting on an elastically mounted cylinder is compared with the force acting on a fixed cylinder. Grid independency of the computed body motion is established based on a comparison of results using three different-size grids.