Magnetohydrodynamics refers to the interaction between an applied electromagnetic field and a flowing, electrically-conductive fluid. The Ansys Fluent MHD model enables you to analyze the behavior of electrically conducting fluid flow under the influence of constant (DC) or oscillating (AC) electromagnetic fields. The externally-imposed magnetic field may be generated either by selecting simple built-in functions or by importing a user-supplied data file. For multiphase flows, the MHD model is compatible with both the discrete phase model (DPM), the volume-of-fluid (VOF) and Eulerian Multiphase in Ansys Fluent, including the effects of a discrete phase on the electrical conductivity of the mixture.

This chapter describes the Ansys Fluent MHD model. Modeling Magnetohydrodynamics provides theoretical background information. Implementation summarizes the UDF-based software implementation. Instructions for getting started with the model are provided in Using the Ansys Fluent MHD Module. Guidelines For Using the Ansys Fluent MHD Model provides a condensed overview on how to use the MHD model, while Definitions of the Magnetic Field contains definitions for the magnetic field, External Magnetic Field Data Format describes the external magnetic field data format, and Magnetohydrodynamics Text Commands lists the text commands in the MHD model.