Experimental Study of Debris Flows
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Volume 120, Issue 1
Abstract
A steady uniform flow of high concentration sand‐water mixture was recirculated in a flume using a progressing cavity pump. The flume was set on a slope of 28.6%. A specially designed volumetric flow sampler was used to measure the vertical velocity and concentration profiles at the center of the channel. Velocity and concentration distributions are presented for flows with almost uniform sand particles of sizes 0.430, 0.335, and 0.215 mm. Similar distributions are also presented for flows having a mixture of these three sand sizes with a mean diameter of 0.33 mm. Mean volumetric concentrations for these flows ranged from approximately 2.5% to 43.5%. These measurements are compared with the predictions of dilatant fluid as well as laminar and turbulent Newtonian fluid models. The difficulties associated with laboratory handling and measurements of high concentration fluid flow in an open channel have been discussed.
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Published In
Journal of Hydraulic Engineering
Volume 120 • Issue 1 • January 1994
Pages: 104 - 123
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Dec 26, 1991
Published online: Jan 1, 1994
Published in print: Jan 1994
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