Simulation of irregular waves over submerged obstacle on a NURBS potential numerical wave tank

Arash Abbasnia, Mahmoud Ghiasi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


In this paper, a fully non-linear three-dimensional Numerical Wave Tank (NWT) is developed for studying propagation and scattering of non-linear random sea wave over bottom submerged bars. The simulation of fully non-linear free-surface is based on Non-Uniform Rational B-Spline formulation (NURBS) as a novel approach and Mixed Eulerian-Lagrangian method (MEL). Highorder boundary integral equation is used to solve the Laplace equation in the Eulerian frame. To update the free-surface, time marching approach including material node method and fourth order Runge-Kutta time integration scheme is used. To obtain appropriate numerical solutions for wave propagation problem, damping zone is set at the downstream. Also, the NURBS approximation is employed to evaluate the velocity of the free-surface particles. Propagation of regular and irregular waves in a NWT is investigated and compared with the available experimental and numerical data. Transmission of the random sea wave over sub- merged bars is also compared with the experimental and prior numerical studies.
Original languageEnglish
Pages (from-to)2308-2332
Number of pages25
JournalLatin American Journal of Solids and Structures
Issue number13
Publication statusPublished - 2014


  • Irregular wave
  • Mixed Eulerian-Lagtrangian
  • Non-uniform rational B-spline
  • Numerical wave tank
  • Potential flow


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