A Cartesian cut cell based two-way strong fluid-solid coupling algorithm for 2D floating bodies

Qiang Chen, Jun Zang, Aggelos S. Dimakopoulos, David M. Kelly, Chris J K Williams

Research output: Contribution to journalArticlepeer-review

20 Citations (SciVal)
211 Downloads (Pure)


In a recent paper Kelly et al. (2015) [PICIN: A Particle-In-Cell solver for incompressible free surface flows with two-way fluid-solid coupling. SIAM Journal on Scientific Computing 37 (3), B403-24.] detailed the PICIN full particle Particle-In-Cell (PIC) solver for incompressible free-surface flows. The model described in that paper employed a tailored version of the Distributed Lagrange Multiplier (DLM) method for the strong coupling of fluid-solid interaction. In this paper we propose an alternative strong fluid-solid coupling algorithm based on a modification to the cut cell methodology that is informed by the variational approach. The solid velocity flux/integral on the boundary is expressed purely in terms of pressure leading to a revised pressure Poisson equation that is discretised in a finite volume sense. This approach allows the PICIN model to simulate the motion of floating bodies of arbitrary configuration. 2D test cases involving floating bodies with one or more degrees of freedom (DoF) are used to validate the modified PICIN model. The results presented show that the modified PICIN model is able to both efficiently and robustly predict the motions of surface-piercing floating structures under either regular or extreme wave action.

Original languageEnglish
Pages (from-to)252-271
Number of pages20
JournalJournal of Fluids and Structures
Early online date27 Feb 2016
Publication statusPublished - 1 Apr 2016


  • Computational fluid dynamics
  • Cut cell
  • Floating bodies
  • Navier Stokes pressure projection
  • Particle-In-Cell
  • Two-way fluid structure interaction


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