Why is it meaningful/necessary to model fluid flow and transport processes and how does it work?
CFD models are predestinated to understand complicated flow systems like rivers, lakes or in experiences: flow channels. Fully developed models can be used to simulate extrem events like intense rain situations or spontaneous sediment inputs. The fluid body is devided into cells (elements). In each cell equations for unkown variables are solved (Navier-Stokes equations for fluid dynamics and in a second step Convection-Diffusion equations for sediment transport). The modeled situation is controlled by so called Boundary Conditions to receive a closed, solvable system.
