In the 3D numerical simulation of atmospheric processes (wind, air pollution and forest fires), that we consider in the Coordinated Project in which this present SubProject is included, an efficient finite element mesh generation is a fundamental objective, because we need to consider large domains with irregular orography and chimneys in the studied region. In order to get high precision of domain geometry approximation, it is essential to use adaptive discretization techniques. Relative to this aspect, it is well known that finite element method has interesting advantages over finite difference method. Nevertheless, the implementation of finite element method is more complex. In recent works, we have developed an initial tetrahedral mesh generator adapted to this considerations.
Optimisation and automation of this mesh generation needs to improve element quality applying smoothing and untangling techniques. This aspect is specially needed in chimneys neighbourhood and it is one of the main objectives in this SubProject. Besides, we will study the improvement of numerical methods for maximum decreasing of computational time in simulation of these coupled, nonlinear and unsteady processes. Local refinement and derefinement strategies are also objectives to be optimised for increasing numerical solution approximation.
Finally, we pretend to estimate the main parameters of the models, to develop reduced basis for obtaining real time results and to control simulation quality. The main topic of present SubProject is wind field simulation for air pollution and forest fires processes. In addition, we will study optimum emplacement of wind turbines and evaluation of wind power potential. The national enterprise "Desarrollos Eólicos, S.A." is very interested in this last topic and we hope to validate our results with its collaboration.
