8. Numerical Modeling of Free-Surface Flows in Practical Applications

Nowadays, numerical 1-D and 2-D flow simulations represent state-of-the-art solutions in hydraulic engineering. Hence, 1-D and 2-D as well as coupled simulations are enrooted in consulting companies and used as basic tools to answer various questions from flood protection to flow optimization. An exception are 3-D flow simulations. Due to complex boundary conditions and high calculation requirements, 3-D CFD simulations are expert tools for universities and research institutions. Here, detailed simulation models, e.g. for hydraulic structure flow optimization, are built up under massive time consumption. The present chapter deals with the basics of numerical flow simulations in practical applications. Additionally, various example flow simulations are mentioned to give an impression about the development of numerical modeling in practical application for the past decade.