As subsets of the most general fully three-phase modeling approach, a variety of more simplified flow formulations may be simulated. Each formulation and its numerical scheme are coded with an emphasis on computational efficiency and robustness. A wide range of boundary conditions can be treated including those involving influx and efflux boundaries, water-table conditions, infiltration or recharge, and wells. Currently, HydroGeoLogic is providing a License for use of the code on personal-computers. The executable module is delivered with code documentation and user's manual.
Technical support is available.
The fluid flow and solute transport simulations are performed sequentially. A modified Galerkin finite-element procedure is used to approximate the flow equations. The procedure incorporates upstream weighting of nodal values of phase mobilities and storage matrix lumping for linear rectangular elements. Element matrices are evaluated using enhanced influence-coefficient algorithms that avoid numerical integration and take advantage of nodal connectivities. For each multiphase formulation, a judicious selection of primary variables is made to ensure a favorable Jacobian matrix.