4.4.1 MHD Model Initialization

Initialization of the MHD model involves setting the externally-imposed magnetic field and initializing all MHD related user-defined scalars and memory variables.

When an ANSYS FLUENT case is initialized, all user-defined scalar and memory variables are set to zero. The external magnetic field data is set from the External Field B0 tab in the MHD Model dialog box. The Initialize MHD button under the Solution Control tab can be used to initialize the model during an ANSYS FLUENT solution process. It is used when MHD effects are added to a fully or partially solved flow field, or when the model parameters are changed during an MHD calculation. It only clears the scalar variables and most of the memory locations used in the MHD model, the memory variables for the external magnetic field data are preserved.