3.5 General User-Defined Functions

Several general UDFs are used as part of the MHD model implementation.

• DEFINE_INIT(mhd_init, ...) is an initialization function called during the general case initialization to set up the external magnetic field and initialize MHD model parameters and variables.

• DEFINE_ADJUST(mhd_adjust, ...) is called at the start of each iteration. It is used to adjust the magnetic boundary conditions and update MHD related variables and properties.