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Title: Channel maintenance by training structures : guidance for numerical model mesh development
Authors: Berger, Rutherford C.
Keywords: Finite element
Training structures
Hydraulic structures
Mathematical models
Numerical models
Finite element method
Galerkin methods
Publisher: Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; HL-90-13.
Description: Technical Report
Abstract: Training structures used to control channel currents and sedimentation, which in the past were designed by rules of thumb, are now frequently the subject of numerical model investigations. The precision and stability of numerical models representing the shallow water equations and transport generally are strongly influenced by the nature of the computational mesh upon which the calculations take place. This condition is amplified by the presence of man-made structures in the flow. It is therefore imperative that mesh development in the vicinity of these structures be guided so that accurate and reliable shoaling predictions result. This report uses a series of simple linear model equations applied in a finite element framework to develop guidance for the minimum mesh expansion rate, orientation, skewness, oscillation suppression, and bathymetric effects. While this effort was aimed at the TABS-2 modeling system, the findings are generally applicable to other finite element and finite difference models. Appendix A discusses the elimination of oscillations in the TABS-2 program.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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