Description |
TBC is a further development of the numerical model FLOWBIO developed by RenT Therrien and Wolfgang SchSfer, Kassel University, March 1993. It is able to simulate 3D saturated groundwater flow as well as transport and (bio)chemical reactions of any number of model species. The flow and transport equations are discretized by using the finite difference method, resulting in a seven-point template, or by using the Garlerkin finite element technique, resulting in a 27-point discretization molecule. The use of the seven-point template considerably reduces memory and CPU time required for a solution. The final system of equations is solved by a preconditioned ORTHOMIN solver. The biochemical reactions are described by Monod-type kinetics and the equation system is solved by a special DGEAR routine. Chemical reactions can either be defined as a set of fast equilibrium reactions or as kinetic chemical reactions. The equation system is solved by a Newton-Raphson solver. |