FN Archimer Export Format PT J TI Intercomparison of Three Open-Source Numerical Flumes for the Surface Dynamics of Steep Focused Wave Groups BT AF Vyzikas, Thomas Stagonas, Dimitris Maisondieu, Christophe Greaves, Deborah AS 1:1,2;2:3;3:2;4:1; FF 1:;2:;3:PDG-REM-RDT-LCSM;4:; C1 School of Engineering, Computing and Mathematics, University of Plymouth, Plymouth PL4 8AA, UK Ifremer Centre Bretagne, Laboratoire Comportement des Structures en Mer, 29280 Plouzané, France Department of Civil and Environmental Engineering, University of Cyprus, Nicosia 1678, Cyrpus C2 UNIV PLYMOUTH, UK IFREMER, FRANCE UNIV CYPRUS, CYPRUS SI BREST SE PDG-REM-RDT-LCSM IN WOS Ifremer UPR DOAJ copubli-europe TC 3 UR https://archimer.ifremer.fr/doc/00665/77755/79880.pdf LA English DT Article DE ;extreme waves;focused waves;dispersion;harmonic analysis;CFD;OpenFOAM;SWASH;HOS AB NewWave-type focused wave groups are commonly used to simulate the design wave for a given sea state. These extreme wave events are challenging to reproduce numerically by the various Numerical Wave Tanks (NWTs), due to the high steepness of the wave group and the occurring wave-wave interactions. For such complex problems, the validation of NWTs against experimental results is vital for confirming the applicability of the models. Intercomparisons among different solvers are also important for selecting the most appropriate model in terms of balancing between accuracy and computational cost. The present study compares three open-source NWTs in OpenFOAM, SWASH and HOS-NWT, with experimental results for limiting breaking focused wave groups. The comparison is performed by analysing the propagation of steep wave groups and their extracted harmonics after employing an accurate focusing methodology. The scope is to investigate the capabilities of the solvers for simulating extreme NewWave-type groups, which can be used as the “design wave” for ocean and coastal engineering applications. The results demonstrate the very good performance of the numerical models and provide valuable insights to the design of the NWTs, while highlighting potential limitations in the reproduction of specific harmonics of the wave group. PY 2021 PD JAN SO Fluids SN 2311-5521 PU MDPI AG VL 6 IS 1 UT 000610210600001 DI 10.3390/fluids6010009 ID 77755 ER EF