Numerical Investigation of Wave Production due to Mass Slip Using Finite Volume Method and Overset Mesh

Impulsive waves (i.e., tsunamis) can be generated by sudden displacements of volumes of water induced by earthquakes, landslides, and volcanic eruptions, impacts of asteroids and gradients of atmospheric pressure.

we present a new method for numerically modelling landslide-generated tsunamis in OpenFOAM® by using a new approach based on the Overset mesh technique. This technique, which is based on the use of two (or more) numerical domains, is new in the coastal engineering field and appears to be extremely powerful to model the interaction between a moving body and one or more fluids. Indeed, the accurate resolution around the moving body (i.e., body-fitted approach), guaranteed by this method, and offers a great advantage to study the momentum exchange between the body and the water.

The results have been presented for the dimensionless distance and the normalized geometry of the landslide in the range 5 to 7, 1 to 2, respectively. These numbers have been normalized by the aid of the height of the landslide (a). According to the results of simulations, the tsunamis process is divided into three stages, which were analyzed in details with considering the interactions between the solid and the water reservoir.