Loading...

Towards simulation of 3D nonlinear high-speed vessels motion

Panahi, R ; Sharif University of Technology | 2009

1311 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.oceaneng.2008.11.005
  3. Publisher: 2009
  4. Abstract:
  5. A numerical simulation algorithm based on the finite volume discretisation is presented for analyzing ship motions. The algorithm employs a fractional step method to deal with the coupling between the pressure and velocity fields. The free surface capturing is fulfilled by using a volume of fluid method in which the interface between the liquid (water) and gas (air) phases are computed by solving a scalar transport equation for the volume fraction of the liquid phase. The computed velocity field is employed to evaluate the acting forces and moments on the vessel. Using the strategy of boundary-fitted body-attached mesh and calculating all six degrees-of-freedom of motion in each time step, time history of ship motions including displacements, velocities and accelerations are evaluated. To verify the proposed algorithm, a series of verification tests are conducted. First, a two-dimensional asymmetrical wedge slamming is simulated as a simple type of a common case for high-speed vessels. Then, the steady-state forward motion of a high-speed planing catamaran is investigated. Results of both test cases show good agreement with experimental data. It is concluded that the proposed algorithm can be a promising strategy for both performance prediction and design of high-speed vessels. © 2008 Elsevier Ltd. All rights reserved
  6. Keywords:
  7. Body-attached mesh ; Ship motions ; Two-phase flow ; Air ; Algorithms ; Equations of motion ; Fluid dynamics ; Free volume ; Liquids ; Multiphase flow ; Ships ; Slamming (ships) ; Speed ; Two dimensional ; Two phase flow ; Discretisation ; Experimental datum ; Finite volume ; Fractional step methods ; Free surface capturing ; Freedom of motions ; High-speed ; High-speed vessels ; Liquid-phase ; Numerical simulation algorithms ; Performance predictions ; Scalar transport equations ; Simple types ; Test case ; Time history ; Time steps ; Velocity fields ; Verification tests ; Volume of fluid methods ; Phase interfaces ; Algorithm ; Computer simulation ; Ship design ; Ship motion ; Ship technology ; Three-dimensional modeling
  8. Source: Ocean Engineering ; Volume 36, Issue 3-4 , 2009 , Pages 256-265 ; 00298018 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0029801808002461