Details

Autor(en) / Beteiligte

• Wendland, Edson
• Himmelsbach, Thomas

Titel

Transport simulation with stochastic aperture for a single fracture – comparison with a laboratory experiment

Ist Teil von

• Advances in water resources, 2002, Vol.25 (1), p.19-32

Ort / Verlag

Oxford: Elsevier Ltd

Erscheinungsjahr

2002

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• In order to investigate the migration behaviour of dissolved solutes in a fractured sedimentary host rock two laboratory experiments using pyranine as tracer were performed in a fractured sandstone block. During a first attempt, the experimental breakthrough curves were used to calibrate a three-dimensional numerical model based on the parallel plate approach. In a second approach, the natural roughness of the fracture surface was added to the model by assigning spatially variable apertures to the fracture elements. The experimental results indicate that the matrix diffusion has a decisive influence on the transport process, acting as a retardation term. The numerical investigation shows that solute migration is controlled by the mean aperture of the single fracture. If the variance of the fracture aperture, however, becomes too large the fracture flow becomes increasingly affected by channelling processes.