SSSAJ Journal of Natural Resources and Life Sciences Education
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Published in Soil Sci Soc Am J 31:713-715 (1967)
© 1967 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Osmotic Effects on Water Flow Through a Ceramic Filter1

Ray D. Jackson2

ABSTRACT

Non-Darcy type flow of water through a porous ceramic filter of 0.1µ pore diameter was shown to be caused by osmotic effects. When osmotic effects were accounted for, the flow rate through the filter was proportional to the pressure gradient, indicating that water flow was viscous and not plastic as has been previously reported. Threshold effects, if present, were small. The permeability, calculated by using the viscosity-density ratio for bulk water, was invariant with temperature.

NOTES

1 Contribution from the Soil and Water Conservation Research Division, ARS, USDA.

2 Research Physicist, US Water Conserv. Lab., Phoenix, Ariz.

Received for publication May 4, 1967. Accepted for publication July 21, 1967.






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Copyright © 1967 by the Soil Science Society of America.