Programme by Session

In the lower solar atmosphere, there exists partially-ionised plasma and such an environment changes significantly the dynamics of the plasma-to-magnetic-field interaction. Appropriate numerical treatment of this requires a more complex description than single-fluid magnetohydrodynamics (MHD) can provide.

A 2D two-fluid MHD code is developed to simulate partially-ionised plasma. The code is validated through various standard tests to demonstrate a high level of accuracy and stability. These tests include the Sod-shock tube test in hydrodynamics, and the Brio-Wu shock and Orszag-Tang vortex test in MHD. To calibrate the two-fluid code, we benchmark against a 1D slow-mode MHD shock, known as the switch-off shock. Furthermore, we initiate the Orszag-Tang vortex test in the two-fluid setting, and present the results as a future benchmark test for 2D two-fluid tests.