Computational fluid dynamics (CFD), also known as three-dimensional (3D) hydraulic modeling, is a practical way to predict and visualize how water flows in real-world conditions. CFD solves fundamental flow equations that describe how physical laws govern fluid motion. It also provides detail and insight that one-dimensional (1D) and two-dimensional (2D) hydraulic models cannot deliver by resolving the flow in three directions. Simply put, CFD delivers the practical benefits of physical modeling in a reasonable time and budget.