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Considerations in 2-D Modeling of Hydraulically Steep Flow

by R. C. Berger, (M.ASCE), US Army Engineer Waterways, Experiment Station, Vicksburg, United States,
R. L. Stockstill, (M.ASCE), US Army Engineer Waterways, Experiment Station, Vicksburg, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

Simplifications in the equations used to describe shallow water flow lead to some difficulties in modeling supercritical flow. The hydrostatic assumption produces two significant differences from the actual flow, in that the model's wave celerity is too large and that the energy associated with vertical motion is dissipated instantly. These differences lead to standing waves that protrude into the flow at a greater angle than those produced by the actual flow and a tendency to dissipate succeeding waves too quickly.

Subject Headings: Wave pressure | Water waves | Wave velocity | Shock waves | Hydraulic models | Wave propagation | Two-dimensional models

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