Improved Shiono and Knight Method for Overflow Modeling
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Volume 20, Issue 12
Abstract
The current study presents an improved Shiono and Knight method (SKM) applying the complete secondary flow term that includes both the dispersion and the transverse convection components, which outspread the SKM solution. The model calibration coefficients for quantifying the secondary flow term are specified for the discrete lateral regions, defined based on the perturbation in distribution of lateral depth-averaged velocity and the boundary shear stress distribution. The inaccuracy in prediction of the SKM approach is attributed to poor secondary flow cells modeled in the interface zone. Improved SKM is adapted for laboratory and natural symmetrical and asymmetrical cross sections in both homogeneous and nonhomogeneous boundary conditions. The improved SKM has notably enhanced the precision of the prediction of depth-averaged velocity in the interface zone.
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Acknowledgments
The present research was conducted with support of the Shahrood University of Technology (SUT). The writers are also grateful to the anonymous reviewers for the valuable suggestions and comments that improved the original manuscript.
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Journal of Hydrologic Engineering
Volume 20 • Issue 12 • December 2015
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© 2015 American Society of Civil Engineers.
History
Received: Aug 1, 2014
Accepted: Apr 6, 2015
Published online: Jun 1, 2015
Discussion open until: Nov 1, 2015
Published in print: Dec 1, 2015
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