NIOSHTIC-2 Publications Search

Fluid flow in channels, capillaries, and porous media under the influence of an electric field.

Headley LC; Pierce CI; Sawyer WK
Morgantown, WV: U.S. Department of the Interior, Bureau of Mines, RI 7342, 1970 Jan; :1-33
A series of exploratory tests was conducted to determine the effects of steady electric fields on fluid flow and streaming potential in narrow passages and porous media, the effects of steady electric fields on fluid interfaces, and the influence of internal voltages on fluid flow in a porous porcelain sample. Voltages greater than about 5 kilovolts were found to influence liquid droplets emanating from a capillary tube. Solutions of polyethylene oxide and polyacrylamide in water exhibited widely different behavior than that of other liquids tested. Liquid-liquid displacement tests in porous samples to determine the influence of high voltage applied to the displacing liquid on flow rates and recovery gave no significant differences. No consistently measureable effects were noted, either on flow rate or streaming potential, when an electric field was applied transverse to the direction of flow in porous media and in narrow rectangular or cylindrical channels. Experimental values of formation factor and streaming potential for a porous porcelain sample agreed qualitatively with those calculated from electrokinetic theory for ultrafine capillaries. However, the agreement for the electroviscous effect was not good.
Publication Date
Document Type
IH; Report of Investigations
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
NIOSH Division
Source Name
Morgantown, WV: U.S. Department of the Interior, Bureau of Mines, RI 7342
Page last reviewed: December 10, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division