Abstract
We theoretically and experimentally investigated the frequency response of blobs in porous media to an oscillatory pressure difference. (The term blob refers to a connected liquid mass that occupies one or more pores.) To predict the frequency response analytically, we formulated a simple model pore system consisting of a blob in a capillary tube. This model accounts for the frequency-dependent viscous pressure drops in the blob and the surrounding liquid and for the dynamic capillary pressure that occurs due to contact line pinning. By using the planar laser-induced fluorescence technique, we visualized the dynamic response of blobs in porous media. As predicted by our theory, air and liquid blobs surrounded by an immiscible liquid exhibited resonance in a capillary tube. Furthermore, we showed, for the first time, that a liquid blob in a sphere-packing medium exhibits resonance.
| Original language | English (US) |
|---|---|
| Pages (from-to) | EN61-EN71 |
| Journal | Geophysics |
| Volume | 77 |
| Issue number | 5 |
| DOIs | |
| State | Published - Sep 2012 |
| Externally published | Yes |
Keywords
- Groundwater
- Hydrology
- Imaging
- Visualization
ASJC Scopus subject areas
- Geochemistry and Petrology