Three Dimentional Numerical Simulation of Solitary Wave Runup On Coastlines With Different Shapes Applying OpenFOAM Software

Tsunami threats life and property of millions of people who live at coastlines. It is essential to predict the tsunami run-up through experimental and numerical simulations. Most of the research in this regard are two-dimentional, however, the validation of this assumption has not confirmed yet. In this article, OpenFOAM open source software is applied in order to three dimentionally simulate the solitary waves as the representative of tsunami. First, the propagation and run up of solitary wave around the conical cone are simulated. The results are compared with experimental deta and there is a good agreement between the results of numerical analysis and experimental outcomes and hence the validation of the software outputs are confirmed. Then, the role of coastal shape on wave run up over the beach is investigated. In this regard, number of coastal forms are considered as well as different ratio of bay entrance width to length and friction coefficient. Hereby, both breaking and non-breaking solitary wave are considered. The results show that the run-up is maximum for V shap bays. The maximum run up is increased when the ratio of the width to length is decreased. The results of maximum solitary wave run up over the beach are also compared with the introduced 2D based formula for the maximum run up of non-breaking solitary waves. The formula underestimates the run-up when the shape of the coastline deviated from the straight line.