First Steps of Coupling 2D and 3D Models for Lake Simulations
March 24, 2011
2:30 p.m.
Barbell Janssen
Abstract
When dealing with hydrodynamics in lakes, simulations for a time horizon of at least a year are costly in 3D. In order to overcome the computational costs, we combine a 3D model with a model in 2D. In the 3D model the Navier-Stokes equations are used to describe the flow where in 2D we use the Shallow-Water equations. Ideally, the model used for the whole domain should be the most complex model. Instead, we couple the two models in our approach: In areas of our domain where a high accuracy is needed, we solve our equations in 3D. In other parts of the domain it is sufficient to use the restricted 2D model. First numerical tests derived so far will be presented.