Uploaded December 2025 | Updated September 2026, 1 week ago

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Sewer systems can often contain complex hydraulic structures for diverting and conveying flow to the desired location. In this FLOW-3D HYDRO video, there are three examples of complex structures that contain weirs, orifices, and gates with multiple inlet and outlet pipes at various elevations and orientations. Using CFD modeling, you can gain insight into the flow distribution between the various inlets and outlets of the structure. This can be used to develop rating curves that can feed into your system-wide drainage model for more accurate flow predictions. Learn more at flow3d.com/hydro