Partially saturated soil dynamics including water and airflow

Studying of water and air flow in deforming porous media, in dynamics and fully or partially saturated conditions has many appealing and important application in the civil engineering field. For its complexity and non linearity the problem can be solved only via a numerical procedure based on robust and stable fully coupled dynamic model, like that presented in this work. The research magnificence of this contribution consists in the extension of the coupled model to the dynamic analysis of the porous media with two contemporary flowing immiscible fluids. The model adopts the solid displacements and the pressures of fluids as primary unknowns from those all the other local quantities are derived. The finite element method is used for the discrete approximation of the partial differential equations governing the problem. The model has been validated with respect to documented experiments on partially saturated soil in quasi-static condition. Then it has been applied for the study of a dynamic test of load impact on a initially water saturated sand column.