Enhanced coupling of solid body motion and fluid flow in finite volume framework. (1st October 2017)

• Record Type: Journal Article
• Authors: Gatin, Inno; Vukčević, Vuko; Jasak, Hrvoje; Rusche, Henrik
• Is Part Of: Ocean engineering. Volume 143(2017)
• Page Start: 295
• Page End: 304
• Publication Date: 2017-10-01
• Subjects: 6–DOF rigid body motion -- Motion–fluid coupling -- Seakeeping -- Naval hydrodynamics -- Foam–extend; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2017.08.009
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: An enhanced coupling strategy for the resolution of 6–degrees–of–freedom rigid body motion and unsteady incompressible fluid flow in Finite Volume collocated arrangement using PIMPLE algorithm and rigid mesh motion is presented in this paper. The improved coupling is achieved by calculating the 6–degrees–of–freedom motion equations after each pressure correction step in the pressure–velocity PISO (Pressure Implicit With Splitting of Operators) algorithm. Solving the 6–degrees–of–freedom equations after each solution of the pressure equation of the PISO loop accelerates the convergence, leading to smaller number of nonlinear pressure–velocity iterations needed per time–step. The novel approach is verified and validated on a heaving decay case, while the achieved acceleration in terms of the number of PISO loops is demonstrated on seakeeping simulations of a container ship. Abstract : Highlights: A novel approach for fluid flow-body motion coupling in CFD is proposed. Enhanced coupling of pressure equation and body motion equations is introduced. Reduction of the needed number of nonlinear PISO correctors per time-step is achieved. Significant savings in computational time can be achieved.