Study of Electrokinetic Effects Using Sinusoidal Pressure and Voltage

Abstract

The electrokinetic effects streaming potential, streaming current, and electro-osmotic pressure were studied by applying and measuring sinusoidal variations of hydrodynamic pressure and electrical voltage. Phenomenological relations between the effects were investigated, and an improved experimental method for measuring the electrokinetic coefficients, hence the zeta potential, was used. Saxen's law was verified within 6% at frequencies of 20, 100, and 200 cycles per second. The systems studied were restricted to glass-water and glass-salt solutions. The advantages and disadvantages of using sinusoidally varying quantities for electrokinetic measurements are discussed.

Determination of rock properties by low‐frequency AC electrokinetics

“…This is probably why electroosmosis measurements are still fairly rare in the literature. An early attempt to measure AC electroosmosis in capillaries failed with the larger-diameter samples used and only succeeded with the smaller diameter samples when the applied voltage was high, 250 V peak [Cooke, 1955].…”

Frequency-Dependent Streaming Potential of Porous Media—Part 2: Experimental Measurement of Unconsolidated Materials

“…Its disadvantage is that a high-quality harmonic driving pressure is required to create the time-varying flow. Various authors have shown that measurements on a range of materials are possible in the range 1 Hz to 600 Hz [6][7][8][9][10], but before the recent paper of Tardif et al [11] only one measurement had been made on a geological material [10].…”

Frequency-Dependent Streaming Potentials: A Review

“…The low-frequency oscillator (0.01 Hz to 1 kHz) was used for operation of the push-pull geophone driver. Similar setups were proposed by Thurston [81] (Figure 3) and Cooke [82], so that frequency of this kind of source was 1-400 Hz [82], 20-200 Hz [59], and 10-700 Hz [81]. The induced pressure was up to 2 kPa.…”