Frequency-Dependent Streaming Potential of Porous Media—Part 2: Experimental Measurement of Unconsolidated Materials
Figure 9
The electrokinetic transition frequency as a function of the inverse square characteristic pore size (a) in full and (b) at expanded scale. Black symbols, previous data for capillary tubes, filters frits, and rocks, Figure 6 of [19]; grey symbols, Ottawa sand measured at 24.0°C ± 0.8°C; open symbols, glass bead packs. The dashed lines represent the theoretical result [19] at four different temperatures.
