Interaction of fluid-solid-geomembrane by the material point method

A dynamic, large deformation problem of fluid-solid-geomembrane interaction is analysed by the use of material point method, a variant of the finite element method stated in a Lagrangian-Eulerian format. A low-order element is used for space discretisation and the fluid is treated as a compressible liquid with a high value of bulk modulus. Therefore, two algorithms known from literature are applied to mitigate the effects related to the volumetric locking phenomenon. Moreover, a procedure of detecting the free surface is proposed. The method is applied to problems of determining the shape of geo-tubes, collapsing water column, and finally, to the problem of installation of a geo-container on the bed of a water reservoir. The obtained numerical outcomes are compared with the experimental results and the analytic ones when available.