Weir Scour Hole Formation | FLOW-3D HYDRO @flow3d

Uploaded January 2026 | Updated September 2026, 1 week ago

Water flowing over a weir and plunging into the downstream channel creates scour holes that can undermine hydraulic structures and alter channel morphology. This FLOW-3D HYDRO simulation uses the Sediment Transport model to capture the complex erosion processes at work. The visualization shows different sediment transport mechanisms including bedload transport, entrainment, and deposition as the scour hole develops. CFD modeling can help you predict scour depths and optimize erosion protection measures for weir designs. Learn more at flow3d.com/modeling-capabilities/sediment-transport-model

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$Air Entrainment at a Labyrinth Spillway | FLOW-3D HYDRO This example of a labyrinth weir spillway illustrates FLOW-3D HYDROs air entrainment physics in a one-fluid volume of fluid model. The air entrainment physics estimate the rate at which gas (represented by void regions) is entrained into the flow using a balance of stabilizing forces (gravity and surface tension) and destabilizing forces (turbulence). Although the primary focus of the model is to compute the air entrainment resulting from turbulent disturbances at a free surface, the model also contains logic for handling entrainment resulting from laminar jets impinging on a free surface. In this video, the fluid is colored by the entrained air volume fraction calculated by the air entrainment physics. Learn more about FLOW-3D HYDRO, an industry leader in free-surface flow modeling and is used by dam professionals to address a wide range of design problems. https://www.flow3d.com/products/flow-3d-hydro/dams-and-spillways/$

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