Figure of 《Three-dimensional numerical simulation of Coronal solar wind》

In this paper, the 3D coronal solar wind is studied by using this model. In order to simulate the heating and acceleration of solar wind in coronal region, the volume heating term in the model is improved.For the MHD simulation,there is one of the key problems to remove the ▽·B constrain error.

Then, the influence of different methods to reduce the ▽·B constrain error on the coronal solar wind structure is discussed. The background solar wind of CR2199 is simulated by diffusive method, Powell method , Diffusive and Powell method, they can all produce large-scale solar wind and the Diffusive and Powell method can maintain divergence cleaning constraint better to a certain extent,the relative magnetic field divergence error can be controlled at the order of 10-9 .