Studies of flow in alluvial channels: WSP 1948, chapter, some properties of water-clay dispersions and their effect on flow
Fine material (bentonite and kaolin clays) dispersed in water have a very definite affect on the viscosity and specific weight of the fluid. Tests at 24 degrees centigrade, with a Stormer viscosimeter showed that the apparent kinematic viscosity for a ten percent by weight water-clay dispersion of bentonite was 8.75 times greater than that of clear water and kaolin was 1.40 times greater. The change in viscosity and density of the fluid changes the fall velocity of the bed material. The affect of fine material on the fall velocity of the bed material can be determined, as a first approximation, ...
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