C. Hung, A.S. Brun, A. Fournier, O. Talagrand

We will review recent progress made in modeling solar-type stars in 2D and 3D in the recent years. In particular, we will focus on advances in our understanding of the dynamo processes in such astrophysical objects and the necessary ingredients to reproduce what is found in the observations. We will also present recent attempts to introduce such observational data into multi-D MHD models. The idea is to implement data assimilation techniques to solar physics in order to have some tools to give tentative predictions of future solar activity.