Options
Reliable damping of free-surface waves in numerical simulations
Publikationstyp
Journal Article
Date Issued
2016
Sprache
English
Author(s)
Institut
TORE-URI
Journal
Volume
63
Issue
1
Start Page
1
End Page
13
Citation
Ship Technology Research 1 (63): 1-13 (2016)
Publisher DOI
Scopus ID
This paper generalises existing approaches for free-surface wave damping via momentum sinks for flow simulations based on the Navier-Stokes equations. It is shown in 2D flow simulations that, to obtain reliable wave damping, the coefficients in the damping functions must be adjusted to the wave parameters. A scaling law for selecting these damping coefficients is presented, which enables similarity of the damping in model and full scale. The influence of the thickness of the damping layer, the wave steepness, the mesh fineness and the choice of the damping coefficients are examined. An efficient approach for estimating the optimal damping setup is presented. Results of 3D ship resistance computations show that the scaling laws apply to such simulations as well, so the damping coefficients should be adjusted for every simulation to ensure convergence of the solution in both model and full scale. Finally, practical recommendations for the setup of reliable damping in flow simulations with regular and irregular free-surface waves are given.
Subjects
Absorbing layer
Damping coefficient
Damping of free-surface waves
Scaling law
Volume of fluid (VOF) method