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Non-linear wave generation and absorption using open boundaries within DualSPHysics

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Verbrugghe, Tim
Domínguez Alonso, José Manuel
Altomare, CorradoMés informacióMés informacióMés informació
Tafuni, Angelantonio
Vacondio, Renato
Troch, Peter
Kortenhaus, Andreas
Document typeArticle
Defense date2019-07
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
The present work introduces the implementation of wave generation and wave absorption of nonlinear, long-crested regular and irregular waves in the WCSPH-based (Weakly Compressible Smoothed Particle Hydrodynamics) DualSPHysics solver. Open boundaries are applied here for both wave generation and absorption. These boundaries consist of buffer zones, on which physical quantities are imposed, or extrapolated from the fluid domain using ghost nodes. Several layers of buffer particles are used to create an inlet and an outlet, where the horizontal component of the orbital velocities, surface elevation and pressure can be imposed from any external source or extrapolated from the fluid domain. This allows the creation of a numerical wave flume with a length of one wavelength. Reflections within the fluid domain are successfully mitigated using a velocity correction term at both inlet and outlet. The implementation is validated with theoretical solutions, in terms of water surface elevation, wave orbital velocities, and dynamic pressure. The model proves to be capable of propagating waves with less than 5% reflection, and RMSE errors on physical quantities lower than 4.3%. The application of open boundaries proves to be an accurate method to generate and absorb non-linear waves within a restricted domain
CitationVerbrugghe, T. [et al.]. Non-linear wave generation and absorption using open boundaries within DualSPHysics. "Computer physics communications", Juliol 2019, vol. 240, p. 46-59. 
URIhttp://hdl.handle.net/2117/340570
DOI10.1016/j.cpc.2019.02.003
ISSN0010-4655
Publisher versionhttps://www.sciencedirect.com/science/article/pii/S0010465519300463
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  • LIM/UPC - Laboratori d'Enginyeria Marítima - Articles de revista [221]
  • Departament d'Enginyeria Civil i Ambiental - Articles de revista [2.501]
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