Head Requirement for Incipient Fluidization of Fine Sands in Unbounded Domains
Publication: Journal of Hydraulic Engineering
Volume 121, Issue 11
Abstract
Fluidization systems in the coastal environment can be used to maintain channels and aid in sand bypassing. Induced flow from small holes in a buried source pipe will fluidize the overlying sand for a sufficiently high flow rate. One important design parameter is the required hydraulic head at the incipient fluidization condition to overcome the porous media head loss. The three-dimensional governing equation for head was solved with the finite-difference method using the theoretical critical hydraulic gradient at the incipient fluidization condition. After comparison to two-dimensional solutions and experimental results, the incipient-condition head-loss requirement was simulated for field geometries. The results indicate that 3-D effects are dissipated within 3 cm from the holes, where about 80% of the head loss occurs. The head requirement is higher for the 3-D simulations compared to 2-D due to the rapid decrease of head near a hole.
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Information
Published In
Journal of Hydraulic Engineering
Volume 121 • Issue 11 • November 1995
Pages: 838 - 841
Copyright
Copyright © 1995 American Society of Civil Engineers.
History
Published online: Nov 1, 1995
Published in print: Nov 1995
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