SPH modeling of mean velocity circulation in a rip current system

Rozita Jalali Farahani, Robert A. Dalrymple, Alexis Hérault, Giuseppe Bilotta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

A Lagrangian numerical model called Smoothed Particle Hydrodynamics is used to analyze rip current system generated by a single bar and a rip channel. The pattern of the wave-induced circulation cell over the bar, the oppositely-rotating circulation cell on-shore and a strong seaward-directed current in the rip channel is modeled numerically. The mean horizontal variations of rip current system as well as three-dimensional circulations are studied. The results in three-dimensional space reveal the wave-current interaction and flow patterns in different parts of rip channel, bar, and the trough located near shore. For comparison to experimental data, Eulerian nodes are introduced to the numerical model and SPH interpolation over neighboring Lagrangian particles is implemented to find fluid parameters at those specific nodes. This methodology leads to a better understanding of depth-integrated flows and a more accurate comparison of numerical results with experimental results. Model predictions are compared to laboratory measurements of Drønen et al. (2002) and show good agreement, including mean velocity profiles, mean surface elevation and three-dimensional velocity components.

Original languageEnglish (US)
Title of host publicationProceedings of the 33rd International Conference on Coastal Engineering 2012, ICCE 2012
StatePublished - Dec 1 2012
Event33rd International Conference on Coastal Engineering 2012, ICCE 2012 - Santander, Spain
Duration: Jul 1 2012Jul 6 2012

Other

Other33rd International Conference on Coastal Engineering 2012, ICCE 2012
CountrySpain
CitySantander
Period7/1/127/6/12

Keywords

  • Near-shore circulations
  • Rip current system
  • Smoothed Particle Hydrodynamics

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Ocean Engineering
  • Oceanography

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