Next Article in Journal
A Novel Vision-Based Towing Angle Estimation for Maritime Towing Operations
Next Article in Special Issue
Unsteady RANS CFD Simulations of Sailboat’s Hull and Comparison with Full-Scale Test
Previous Article in Journal
Path Following of a Water-Jetted USV Based on Maneuverability Tests
Previous Article in Special Issue
Numerical Investigation of Unsteady Cavitation Dynamics over a NACA66 Hydrofoil near a Free Surface
Open AccessArticle

Viscous Damping Identification for a Wave Energy Converter Using CFD-URANS Simulations

Department of Mechanical and Aerospace Engineering, Polytechnic of Turin, C.so Duca degli Abruzzi, 24, 10129 Turin, Italy
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
J. Mar. Sci. Eng. 2020, 8(5), 355; https://doi.org/10.3390/jmse8050355
Received: 19 April 2020 / Revised: 12 May 2020 / Accepted: 14 May 2020 / Published: 17 May 2020
(This article belongs to the Special Issue CFD Simulations of Marine Hydrodynamics)
During the optimization phase of a wave energy converter (WEC), it is essential to be able to rely on a model that is both fast and accurate. In this regard, Computational Fluid Dynamic (CFD) with Reynolds Averaged Navier–Stokes (RANS) approach is not suitable for optimization studies, given its computational cost, while methods based on potential theory are fast but not accurate enough. A good compromise can be found in boundary element methods (BEMs), based on potential theory, with the addition of non-linearities. This paper deals with the identification of viscous parameters to account for such non-linearities, based on CFD-Unsteady RANS (URANS) analysis. The work proposes two different methodologies to identify the viscous damping along the rotational degree of freedom (DOF) of pitch and roll: The first solely involves the outcomes of the CFD simulations, computing the viscous damping coefficients through the logarithmic decrement method, the second approach solves the Cummins’ equation of motion, via a Runge-Kutta scheme, selecting the damping coefficients that minimize the difference with CFD time series. The viscous damping is mostly linear for pitch and quadratic for roll, given the shape of the WEC analysed. View Full-Text
Keywords: wave energy; computational fluid dynamics; identification; viscous damping; URANS wave energy; computational fluid dynamics; identification; viscous damping; URANS
Show Figures

Figure 1

MDPI and ACS Style

Fontana, M.; Casalone, P.; Sirigu, S.A.; Giorgi, G.; Bracco, G.; Mattiazzo, G. Viscous Damping Identification for a Wave Energy Converter Using CFD-URANS Simulations. J. Mar. Sci. Eng. 2020, 8, 355. https://doi.org/10.3390/jmse8050355

AMA Style

Fontana M, Casalone P, Sirigu SA, Giorgi G, Bracco G, Mattiazzo G. Viscous Damping Identification for a Wave Energy Converter Using CFD-URANS Simulations. Journal of Marine Science and Engineering. 2020; 8(5):355. https://doi.org/10.3390/jmse8050355

Chicago/Turabian Style

Fontana, Marco; Casalone, Pietro; Sirigu, Sergej A.; Giorgi, Giuseppe; Bracco, Giovanni; Mattiazzo, Giuliana. 2020. "Viscous Damping Identification for a Wave Energy Converter Using CFD-URANS Simulations" J. Mar. Sci. Eng. 8, no. 5: 355. https://doi.org/10.3390/jmse8050355

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop