Abstract
ABSTRACT This paper presents the first successful application of Wavy Interface (WI) free-surface wave-generation boundary model within a worldwide explicit-type Smoothed Particle Hydrodynamics (SPH) framework, namely δ-SPH. The WI model was originally designed for projection-based semi-implicit particle method, which enables wave generation using only wave height data as input, rather than any other data (e.g. velocity). Despite its innovative concept, the WI model has not been applied to any explicit SPH models, including δ-SPH, primarily due to the issue related to volume conservation error. In contrast to projection-based semi-implicit particle method, the δ-SPH has no explicit restriction on kernel summation-based density to remain constant. This feature is not suitable with WI model, which generates waves through particle generation/removal around free surface without consideration of volume conservations. In this study, to remedy this challenge and develop volume-conserving WI model, the recently proposed enhanced schemes, including corrected pressure gradient (δ-SPHC) and Volume Conservation Shifting (VCS), are incorporated fGor minimization of both local and total volume errors arising during WI wave generations. Verifications and validations are made through benchmark tests of wave propagation, wave overtopping, and solitary wave generation. The obtained results demonstrate that the presented δ-SPHC-VCS with WI model can accurately reproduce target propagating waves with local/total volumes being conserved.
Published Version
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