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Modeling of Surface Vortices in Unsteady Flow

by Richard L. Stockstill, US Army Corp of Engineers Waterways, Experiment Station, Vicksburg, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

Hydraulic model studies of lock filling and emptying systems include investigating vortex tendencies at the intake vincinity during filling. The flow at the intake vicinity is unsteady due to decreasing head. Existing modeling criteria for surface vortices to obtain the best similarity between model and prototype have predominately involved steady flow. The flow patterns at the intake vicinity of existing prototype locks are compared to the flow patterns reported in model studies of these projects. The modeling criteria established for surface vortices in steady flow is evaluated for projects having unsteady flow where good model-prototype similarity exists.

Subject Headings: Hydraulic models | Flow patterns | Fluid flow | Water intakes | Vortices | Unsteady flow | Overland flow

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