Analytical prediction of reflection coefficients for wave absorbing layers in flow simulations of regular free-surface waves

Publikationstyp
Journal Article
Date Issued
2018-01-01
Sprache
English
Author(s)
Peric, Robinson  
Abdel-Maksoud, Moustafa  orcid-logo
Institut
Fluiddynamik und Schiffstheorie M-8  
TORE-URI
http://hdl.handle.net/11420/2627
Journal
Ocean engineering  
Volume
147
Start Page
132
End Page
147
Citation
Ocean Engineering (147): 132-147 (2018-01-01)
Publisher DOI
10.1016/j.oceaneng.2017.10.009
Scopus ID
2-s2.0-85033562973
ArXiv ID
1705.06940v2
Undesired wave reflections, which occur at domain boundaries in flow simulations with free-surface waves, can be minimized by applying source terms in the vicinity of the boundary to damp the waves. Examples of such approaches are absorbing layers, damping zones, forcing zones, relaxation zones and sponge layers. A problem with these approaches is that the effectivity of the wave damping depends on the parameters in the source term functions, which are case-dependent and must be adjusted to the wave. The present paper presents a theory which analytically predicts the reflection coefficients and which can be used to optimally select the source term parameters before running the simulation. The theory is given in a general form so that it is applicable to many existing implementations. It is validated against results from finite-volume-based flow simulations of regular free-surface waves and found to be of satisfactory accuracy for practical purposes.
Subjects
Physics - Fluid Dynamics
Physics - Fluid Dynamics