Vertical Mixing in the Fully Developed Turbulent Layer of Sediment-Laden Open-Channel Flow
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VIEW THE REPLYPublication: Journal of Hydraulic Engineering
Volume 134, Issue 9
Abstract
Eulerian equations for the vertical flux and momentum of suspended particles in dilute sediment-laden open-channel flow in equilibrium have been derived using the two-fluid approach. Reynolds averaging has been applied in order to allow validation of individual terms with experimental data. Consideration of the various terms of the vertical momentum balance with experimental flume data indicates that the drag force has to be separated into a mean and a turbulent contribution with different timescales, respectively, the (gravitational) particle timescale and the integral turbulence timescale. The resulting formulation further provides a new theoretical closure for the turbulent Schmidt number.
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Acknowledgments
The writer’s position is financed by the K.U. Leuven Special Research Fund. This work is a contribution to the FWO Project No. G0359.04 funded by the Flemish Science Foundation (FWO Vlaanderen). Massimo Cellino kindly made available his partially processed data from his Ph.D. research at Ecole Polytechnique Fédérale de Lausanne.
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Information
Published In
Journal of Hydraulic Engineering
Volume 134 • Issue 9 • September 2008
Pages: 1225 - 1235
Copyright
© 2008 ASCE.
History
Received: Sep 21, 2006
Accepted: Jan 7, 2008
Published online: Sep 1, 2008
Published in print: Sep 2008
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