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oai:recercat.cat:2117/3323512026-02-07T01:06:10Zcom_2072_1033col_2072_452949

Numerical investigation of nonlinear wave interaction with a submerged object Ning, Dezhi Li, Qingxin Viola, Ignacio Maria Àrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits Finite element method Marine engineering Submerged object, nonlinear numerical wave flume, higher-order boundary element method, higher harmonics Submerged objects are widely occurred in ocean and coastal engineering. Their presence influences the neighbouring flow field and even generates higher harmonic waves. A two-dimensional fully nonlinear numerical wave flume, based on a time-domain higher-order boundary element method is developed to investigate nonlinear interactions between regular waves and a submerged object. The incident wave is generated by the inner-source wavemaker. Fully nonlinear kinematics and dynamics boundary conditions are satisfied on the transient free surface. A mixed Eulerian-Lagrangian technique combined with the fourth- order Runge-Kutta scheme is used as the time marching process. A four-point method is used to separate bound and free harmonic waves. The proposed model is verified against the experimental and other numerical data for nonlinear waves scattering by a submerged trapezoid and a submerged horizontal cylinder, respectively. Numerical tests are performed to investigate the effects of submergence and characterised length of a submerged object, static water depth on the high free harmonics. 2015 Conference report Ning, D.; Li, Q.; Viola, I.M. Numerical investigation of nonlinear wave interaction with a submerged object. A: MARINE VI. "MARINE VI : proceedings of the VI International Conference on Computational Methods in Marine Engineering". CIMNE, 2015, p. 456-467. ISBN 978-84-943928-6-3. 978-84-943928-6-3 https://hdl.handle.net/2117/332351 eng Open Access 12 p. application/pdf CIMNE