Application of a vortex tracking method to the piston-like behaviour in a semi-entrained vertical gap

A two-dimensional numerical and experimental study of resonant coupled ship and piston-mode motion

“…The circulation is roughly speaking 45 • out of phase with the relative ambient flow, such that the phase creates a back-flow acting as a damping. Kristiansen and Faltinsen [15] studied the damping effect of flow separation in the case of forced heave of two rectangular hulls (moonpool) which is equivalent to a ship section by a bottom mounted terminal with b half that of the distance between the two hulls. They found that the flow separation effect explained the discrepancies between linear theory and model test results.…”

“…References to works that deal with flow separation from rounded corners when applying vortex tracking models is given in [15]. In the present implementation, separation only from sharp corners are considered.…”

“…We use the latter and the method is described in [15]. They studied the damping effect from flow separation at the ship bilges on the piston-mode motion under forced heave of a ship section by a bottom mounted terminal.…”

Numerical investigations on transient behaviours of two 3-D freely floating structures by using a fully nonlinear method

“…Kristiansen and Faltinsen (2008), Yan (2009), Sun, Eatock Taylor andTaylor (2010). Although the 2 nd -order disturbance theory may give acceptable results, previous studies based on fully nonlinear 3D simulations addressing multiple structures [Ma and Yan (2009), Yan et al (2008, 2011a] has identified that the 3 rd -order and higher-order components of forces and motions are considerably large in many cases.…”

Numerical Analysis on Hydrodynamic Forces Acting on Side-by-Side Arranged Two-Dimensional Floating Bodies in Viscous Flows

“…Kristiansen and Faltinsen (2008)은 보텍스 추적법 을 사용하여 2차원 문풀에 대한 Faltinsen, et al (2007)의 실험 결과와 비교하였고, 최근에는 유한 체적법에 기초한 영역 분할법 을 사용하여 점성의 효과를 고려하였다 (Kristiansen & Faltinsen, 2012). Heo, et al (2010) …”