Abstract— This paper describes Galerkin finite element (FEFLOW) models for the simulation of groundwater flow in twodimensional, transient, unconfined groundwater flow systems. This study involves validation of FEFLOW model with reported analytical solutions and also comparison of reported Explicit Finite Difference Model for groundwater flow simulation (FDFLOW). The model is further used to ob...

This paper proposes groundwater flow simulation models based on explicit finite difference method (FDFLOW) and Galerkin finite element method (FEFLOW) and solute transport simulation models based on Galerkin finite element method (FESOLUTE), random walk method (RWSOLUTE) and modified method of characteristic (MMOCSOLUTE). These coupled flow and transport models are aimed at simulation of solute...

The use of an efficient linear solver is very important to reduce the overall runtime of a flow simulation. However, if a linear solver will be very fast e.g. in case of a time dependent model it does not have to be efficient in case of a steady-state model. The efficiency of the linear solver may even change during a simulation run. Hence, there is the need to develop a solver control which ch...

The multi-species transport model MT3DMS is applied to simulate heat transport in shallow confined aquifers. This is done by taking advantage of the mathematical similarities between the description of heat and solute transport. A comprehensive analysis on the applicability of MT3DMS (version 5.2) for heat transport simulation of closed shallow geothermal systems is shown. MT3DMS simulations ar...

Building up a time-dependent FEM model the user has to master huge amounts of data inside and outside of the FEM model. For common groundwater modeling projects the time-dependent data that should be included into the FEM model has to be stored „outside“ in database or GIS systems in form of time varying functions applied to point, line or polygon features or in form of areal distributions of t...

The paper deals with the distributed solution of simulation based nonlinear constrained optimization problems in engineering on a network of workstations. This type of non-linear optimization and control problems in engineering can be generally characterized as non{convex and non-smooth. Additionally, the involved simulation introduces certain numerical "noise\ to the solution process. These ch...

Abstract Nowadays, utilizing shallow geothermal energy for heating and cooling buildings has received increased interest in the building sector. Among different technologies, large borehole heat exchanger arrays are widely employed to supply various types of buildings. Recently, a 16-borehole array was constructed extract provide newly-developed public Berlin. To guarantee quality numerical mod...