FLUID-STRUCTURE INTERACTION IN NUMERICAL SIMULATIONS OF LIQUID SLOSHING

The problem of a reliable determination of the level and duration of impact pressure in sloshing numerical simulations is strictly linked to the possibility of taking into account the interaction between the fluid and the container structure. Generally sloshing numerical simulation are performed by means of computer programs based on the solution in the time domain of a system of RANSE equations (Reynolds Averaged Navier-Stokes Equations) spatially discretized by the finite volume scheme. The adoption of incompressible fluid characteristics in the schematization of the fluid-dynamic problem leads to a noticeably high increase of the peak of the impact pressure with the reduction of the solution time-step. This dependence is still present even in the case where some 'limited' or 'acoustic' compressibility scheme is adopted in the fluid modelling. Many physical factors are actually recognised to influence the peak value of the pressure during a sloshing impact, such as liquid compressibility or air entrainment in the fluid. In the case ship tank configurations are considered, the influence of the structural response may be considered as one of the primary reduction factors for the pressure peaks. A solution to this numerical problem is therefore envisaged in the coupling of the structural response under pressure impacts and the fluid-dynamic equations.

  • Supplemental Notes:
    • Intl Seminar on Hydroelasticity for Ship Structural Design; 15 Feb 1996; Genova, Italy. Sponsored by CETENA, Italy. Pprs. [6 p, 4 ref, 1 fig]
  • Authors:
    • Casella, G
    • Sebastiani, L
    • Valdenazzi, F
  • Publication Date: 1996

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00728017
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Nov 4 1996 12:00AM