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Institut für Wasserbau - IWS

Selected Topics and International Network Lectures

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Dienstag
06.07.2004
16:00 Uhr
Dr. Jürgen Geiser, Institute of Computer Science, Universität Heidelberg

Modelling, Mathematical Background and Simulation of a waste-disposal for radioactive contaminants in a salt-dome

Our model is based on a potential waste-scenario for a disposal of radioactive contaminants transported with groundwater in porous media. The underlying equations are a system of convection-diffusion-reaction-equation coupled with the reaction-term. We present a solution method, based on the Operator-Splitting-method, to decouple the multi-physical and multi-dimensional processes in simple physical and one-dimensional processes. These simpler equations are discretised with analytical and numerical methods. A new discretisation-method with embedded analytical solutions is introduced. We realise the discretisation and solver methods in the program-tool R3T (radionuclide-reaction-retardation-transport), which was based on the $UG$ (unstructed grid) software-toolbox. Numerical benchmark-problems are used to verify the new method. The realistic applications of a waste-disposal is presented with different 2d and 3d transport and reaction computations. Different locations for the waste-disposal of the overlying rock present the usability of the disposals. The massive parallel computations are presented with the comparison of uniform and adaptive computations. Finally we propose the further works.