City Research Online

Abstract

The paper presents the contribution to the CCP-WSI Blind Test, in which the responses of wave energy converters (WECs) subjected to extreme waves are considered, by a hybrid model, qaleFOAM coupling a two-phase Navier-Stokes model (NS) and the fully nonlinear potential theory (FNPT) using the spatially hierarchical approach. The former governs a limited computational domain (NS domain) around the structures and is solved by the OpenFOAM/InterDyMFoam. The latter covers the rest of the domain (FNPT domain) and is solved by using the Quasi Lagrangian Eulerian Finite Element Method (QALE-FEM). Two numerical techniques have been developed to tackle the challenges and maximizing the computational efficiency of the qaleFOAM, including a modified solver for the six degrees-of-freedom (6DoF) motions of rigid bodies in the NS model and an improved passive wave absorber imposed at the outlet of the NS domain. With these developments, the accuracy and the computational efficiency of the qaleFOAM is analyzed for the cases considered in the Blind Test.

Publication Type:	Article
Publisher Keywords:	Hybrid model, qaleFOAM, NS, FNPT, wave absorber, blind tes
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering
Departments:	School of Science & Technology > Engineering
SWORD Depositor:	Symplectic Administrator

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