Frequency-Dependent Streaming Potential of Porous Media—Part 1: Experimental Approaches and Apparatus Design
Figure 4
The electromagnetic drive apparatus for measuring the time-dependent streaming potential coefficient of granular media; (a) diagram, (b) photograph. (1) Port for fluid circulation or pressure transducer (2 at each end), (2) space for sample, (3) support spring and perforated end-piece, (4) piston, (5) precision electromagnetic shaker, (6) position of electrodes, and (7) linear motion sensor (LVDT).
