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Fluid Flow in Channels, Capillaries, and Porous Media under the Influence of an Electric Field.

PB190013

Publication Date	1970
Personal Author	Headley, L. C.; Pierce, C. I.; Sawyer, W. K.
Page Count	41
Abstract	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 measurable 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 procelain sample agreed qualitatively with those calculated from electrokinetic theory for ultrafine capillaries. However, the agreement for the electroviscous effect was not good. (Author)
Keywords	Fluid flow Electric fields Petroleum Two-phase flow Porous materials Capillary tubes Interfaces Mathematical analysis Oil reservoirs
NTIS Subject Category	46B - Fluid Mechanics 48A - Mineral Industries
Corporate Authors	BUREAU OF Mines, Washington, D.C.
Document Type	Technical Report
Title Note	Report of Investigations.
NTIS Issue Number	197009

Fluid Flow in Channels, Capillaries, and Porous Media under the Influence of an Electric Field.

Fluid Flow in Channels, Capillaries, and Porous Media under the Influence of an Electric Field.
PB190013

Publication Date	1970
Personal Author	Headley, L. C.; Pierce, C. I.; Sawyer, W. K.
Page Count	41
Abstract	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 measurable 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 procelain sample agreed qualitatively with those calculated from electrokinetic theory for ultrafine capillaries. However, the agreement for the electroviscous effect was not good. (Author)
Keywords	Fluid flow Electric fields Petroleum Two-phase flow Porous materials Capillary tubes Interfaces Mathematical analysis Oil reservoirs
NTIS Subject Category	46B - Fluid Mechanics 48A - Mineral Industries
Corporate Authors	BUREAU OF Mines, Washington, D.C.
Document Type	Technical Report
Title Note	Report of Investigations.
NTIS Issue Number	197009