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Time domain simulations of piston-like resonant flow in the gap of an oscillating twin-hull using inviscid and viscous flow solvers
Citation Link: https://doi.org/10.15480/882.3550
Publikationstyp
Journal Article
Publikationsdatum
2021-02-12
Sprache
English
Author
TORE-URI
Enthalten in
Volume
223
Article Number
108672
Citation
Ocean Engineering (223): 108672 (2021)
Publisher DOI
Scopus ID
Publisher
Elsevier Science
A numerical study of a semi-circular twin-hull section under heave oscillation is presented. Two different time domain simulation methods were used: Firstly, a boundary element method based on potential theory which incorporates fully nonlinear free surface boundary conditions by using a mixed Eulerian Lagrangian scheme. Secondly, a finite volume method in combination with a volume of fluid scheme for capturing the free surface. In order to evaluate the effects of viscosity, simulations with the finite volume method were carried out using inviscid as well as viscous flow assumptions. Hydrodynamic mass and damping coefficients were derived from first order Fourier coefficients and validated against results from linear theory and experiments. A detailed comparison of nonlinear results from both simulation methods was carried out in vicinity of the piston-mode resonance frequency and a very good agreement was found. The phase angles corresponding to the Fourier coefficients varied strongly with frequency, which went along with a phase shift of the fluid motion in the gap. Influence of viscosity on the flow was found to be present but had relatively low impact on the hydrodynamic forces.
DDC Class
600: Technik
620: Ingenieurwissenschaften
Publication version
acceptedVersion
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marleaux_et_al_2021_simulating_piston-like_resonant_flow_using_inviscid_and_viscous_solvers_acceptedManuscript.pdf
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