The virtual element method can be formulated as a finite element methods where the basis functions are neither given or computed. The method has the flexibility to handle irregular grid at the cost of an increased error in the energy norm, compared with classical finite element. We follow the implementation from Gain et al  and Beirao da Veiga .
In the examples, we consider several types of irregular grids which covers the main features of geological model such as irregular cell shapes, hanging nodes, high aspect ratios. The boundary conditions can either be set equal to a given force or as Dirichlet boundary conditions. The format supports gliding conditions in Cartesian directions. The illustrations below are compaction tests.
Third component of the stress field on a compaction test for Norne reservoir model
Published November 25, 2016