- AutorIn
- Yujie Li
- German Farrherr
- Rainer Kimmich
- Titel
- Hydrodynamic dispersion of pressure-induced and electroosmotic flow in porous glasses probed by Nuclear Magnetic Resonance
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:15-qucosa-193043
- Quellenangabe
- Diffusion fundamentals - 7
- Quellenangabe
- Diffusion fundamentals 7 (2007) 8, S. 1-12
- Erstveröffentlichung
- 2007
- Abstract (EN)
- Fluid transport by flow in random porous media is subject to hydrodynamic dispersion. In a series of pulsed field-gradient NMR experiments, we have compared flow induced by pressure gradients on the one hand and by electroosmosis on the other. The media were porous glasses with pore dimensions from 1 to 100 μm. With increasing flow rates, a crossover from subdiffusive to superdiffusive mean-squared displacement laws was observed in both cases. This demonstrates the competition between molecular diffusion and convection, and is a typical example of anomalous transport.
- Freie Schlagwörter (DE)
- Diffusion, Transport
- Freie Schlagwörter (EN)
- diffusion, transport
- Klassifikation (DDC)
- 530
- Herausgeber (Institution)
- Universität Ulm
- Universität Leipzig
- URN Qucosa
- urn:nbn:de:bsz:15-qucosa-193043
- Veröffentlichungsdatum Qucosa
- 05.01.2016
- Dokumenttyp
- Artikel
- Sprache des Dokumentes
- Englisch