Analysis of the artificial viscosity in the smoothed particle hydrodynamics modelling of regular waves

Diana De Padova*, Robert A. Dalrymple, Michele Mossa

*Corresponding author for this work

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

This paper considers the effect of artificial viscosity in smoothed particle hydrodynamics (SPH) computations of six different regular waves. The purpose is to improve the modelling of physically real effects and thereby make SPH a more attractive modelling option. The essence of the proposed method is to avoid running the simulation with different values of the empirical coefficient used in artificial viscosity in order to find the optimum value of this parameter for a given problem. Thorough calibration of the SPH's numerical parameters is performed through the comparison between numerical and experimental data. Among the various parameters involved, the smoothing length and the particle resolution are important in shaping the results. The analysis confirms that when the ratio of particle spacing to smoothing length and the particle resolution useful for different computational domains have been defined, the empirical coefficient depends only on the type of wave breaking in term of the Irribarren number.

Original languageEnglish (US)
Pages (from-to)836-848
Number of pages13
JournalJournal of Hydraulic Research
Volume52
Issue number6
DOIs
StatePublished - Nov 2 2014

Keywords

  • Artificial viscosity
  • numerical methods
  • physical modelling
  • regular breaking waves
  • smoothed particle hydrodynamics

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology

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