Instability of Hyperconcentrated Flow
Publication: Journal of Hydraulic Engineering
Volume 110, Issue 3
Abstract
The instability of hyperconcentrated flow observed in nature is reproducible in laboratory flumes using suspensions of bentonite. Similar instabilities are observed in a much simpler hydraulic system consisting of a container feeding a closed conduit. The behavior of two different clay suspensions, kaoline and bentonite, was investigated and the rheological properties were measured in a rotating viscosimeter. The result of the analysis is that the instability is associated with some specific rheological properties. By a simple mathematical model it has been explained why the bentonite suspension was unstable at small discharges and stable at sufficiently large discharges. The kaoline suspensions were always stable. The agreement between calculations and observations is encouraging.
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References
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Qian Ning (Ning Chien), Wan, Z., and Qian, Y. Y., “The Flow with Heavy Sediment Concentration in the Yellow River,” Journal of Qinghua University, Vol. 19, No. 2, 1979, pp. 1–17 (in Chinese).
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Wan, Z., “Bed Material Movement in Hyperconcentrated Flow,” Series Paper No. 31, Institute of Hydrodynamics and Hydraulic Engineering (ISVA), Technical University of Denmark, Nov., 1982.
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Wan, Z., Chien, I. Y., Yang, W. H., and Chao, W. L., “Laboratory Investigation of Hyperconcentrated Flow,” Journal of People's Yellow River, Vol. 1, June, 1979, pp. 53–65 (in Chinese).
Information & Authors
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Published In
Journal of Hydraulic Engineering
Volume 110 • Issue 3 • March 1984
Pages: 219 - 233
Copyright
Copyright © 1984 ASCE.
History
Published online: Mar 1, 1984
Published in print: Mar 1984
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