Section: Contracts and Grants with Industry

Collaboration with ADEME: local modeling for the wind velocity

Participant : Mireille Bossy.

Started in 2005, our joint collaboration with the Laboratoire de Météorologie Dynamique (Université Paris 6, École Polytechnique, École Normale Supérieure) is funded by the French Environment and Energy Management Agency (ADEME) and concerns the modeling and the simulation of local wind energy resources. We collaborate with É. Peirano (ADEME), P. Drobinski and T. Salameh (LMD). The second phase of this collaboration has begun in October 2007 and includes as partners A. Rousseau (Moise Inria Grenoble – Rhône-Alpes) and F. Bernardin (CETE Clermont-Ferrand). We investigate a new method for the numerical simulation of the wind at small scales (see Section 6.1.16 ). Thanks to boundary data provided at large scales by the weather forecasting code MM5 , we propose a Langevin model that rules the behavior of stochastic particles. This model called SDM (Stochastic Downscaling Method) is adapted from previous works introduced by S.B. Pope [63] .

A first meteorological validation, based on simulations of a simple meteorological framework using observations from measurement campaigns, was successful and published in [14] . It underlined the high potential of our Lagrangian Stochastic Model to simulate the wind variability.

This year, major improvements to the SDM model concerned its ability to take into account the forcing conditions at the boundary of the computational domain. We also studied the sensitivity of the (numerical) incompressibility constraints with respect to the forcing values.

This work is preparatory to numerical tests that aim to validate and improve the SDM model for a near wall flow. These tests are based on a comparison with LES method.