Pore Scale Simulation of Transport in Porous Media

When performing solute transport in porous media one often observes an asymmetric break-through curve with a very slow decline of the concentration. This phenomenon even appears with non-sorbing solutes and is known as tailing. There are several hypotheses to explain this phenomenon. The modelling is often done using the mobile-immobile model (MIM), which assumes that parts of the solvent are not moving along with the general flow. The solutes can move into these stagnant zones by diffusion which leads to the observed tailing. In this thesis it is checked whether tailing can indeed be explained by stagnant zones, which may result e.g. from dead-end pores or pores perpendicular to the direction of the flow. A program to simulate transport in porous media was developed and verified using several test-problems. An example calculation with a randomly generated porous medium was performed. The resulting break-through curves showed significant tailing.

Level thesis:degree_level

master

Grantor dc:publisher

Universität Heidelberg

Author dc:creator

• Fahlke, Jorrit

Repository record source_url

http://www.ub.uni-heidelberg.de/archiv/8915

OAI identifier oai:identifier

oai:archiv.ub.uni-heidelberg.de:8915