Internal wave generation on finite element model BOUSS1D_iw

Comparison with experimental data

Conference paper (2007)

Authors

Liliana Pinheiro National Laboratory of Civil Engineering (LNEC)
A. Palha National Laboratory of Civil Engineering (LNEC)
Conceição J.E.M. Fortes National Laboratory of Civil Engineering (LNEC)
Mark Walkley University of Leeds
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Published Date

2007

Language

English

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Abstract

This paper presents a description of a finite element numerical model, BOUSS1D_iw based upon the Boussinesq equation derived by Nwogu (1993). Special attention is given to the procedure implemented into this model for wave generation, by using a source function. In order to validate BOUSS1D_iw model, two literature test cases were chosen. First the BOUSS1D_iw model (one dimensional version) is applied to the simulation of the wave propagation over a constant depth flume considering a regular wave generated in the centre of the flume, to test the source function procedure implemented into the model. After, it is applied to the experiments performed by Dingemans (1994): i.e., the wave propagation over a submerged sill, to analyze the model's performance when simulating the main phenomena involved in nearshore wave propagation, with special attention to nonlinear effects. Comparison between the BOUSS1D_iw numerical results, experimental results and results from another numerical model (Kirby et al (1998)), for time series of water surface elevation and power spectrum, are presented and discussed.