Elektrokinetische untersuchungen an Fasern, 3. Zur Beurteilung von Modellen für Faserpfropfen und der Einstellzeit von Strömungspotential und Strömungsstrom
✍ Scribed by Aichele, Wilfried ;Schollmeyer, Eckhard ;Herlinger, Heinz
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1978
- Weight
- 947 KB
- Volume
- 179
- Category
- Article
- ISSN
- 0025-116X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The present paper shows that the conductivity of an arrangement of fibres in a liquid depends rather insensitively on the zeta‐potential (ζ~s~) calculated according to the Smoluchowski equation. The reason suggested also makes doubtful the theoretical deduction of the Fairbrother‐Mastin method to correct the porosity dependence of the ζ~s~‐potential.
An investigation of the porosity dependence of the three independent coefficients of the phenomenological equations of arbitrary fibres gives an explanation for the fact, that this relation is found to fit in the most cases with the porosity dependence of the ζ~s~‐values. A different arrangement of fibres forming a plug shows that the use of the Smoluchowski equation cannot be expanded from capillaries to plugs using simple corrections.
Finally the time dependence of the streaming current and the streaming potential is discussed and compared with the velocity of the streaming fluid and with the electrical properties of the measuring cell.