1. Introduction

The Magnetohydrodynamics (MHD) module is provided as an addon module with the standard ANSYS FLUENT licensed software.

Magnetohydrodynamics refers to the interaction between an applied electromagnetic field and a flowing, electrically-conductive fluid. The ANSYS FLUENT MHD model allows 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 mixture approaches in ANSYS FLUENT, including the effects of a discrete phase on the electrical conductivity of the mixture.

This document describes the ANSYS FLUENT MHD model. Chapter  2 provides theoretical background information. Chapter  3 summarizes the UDF-based software implementation. Instructions for getting started with the model are provided in Chapter  4. Appendix  A provides a condensed overview on how to use the MHD model, while Appendix  B contains defintions for the magnetic field, Appendix  C describes the external magnetic field data format, and Appendix  D lists the text commands in the MHD model.