2.6 Dynamic Mesh DEFINE Macros

This section contains descriptions of DEFINE macros that you can use to define UDFs that control the behavior of a dynamic mesh. Note that dynamic mesh UDFs that are defined using DEFINE_CG_MOTION, DEFINE_DYNAMIC_ZONE_PROPERTY, DEFINE_GEOM, and DEFINE_GRID_MOTION can only be executed as compiled UDFs.

Table  2.6.1 provides a quick reference guide to the dynamic mesh DEFINE macros, the functions they define, and the dialog boxes where they are activated in ANSYS FLUENT. Definitions of each DEFINE macro are contained in the udf.h header file. For your convenience, they are listed in Appendix  B.

Table 2.6.1: Quick Reference Guide for Dynamic Mesh-Specific DEFINE Macros

Function	DEFINE Macro	Dialog Box Activated In
center of gravity motion	DEFINE_CG_MOTION	Dynamic Mesh Zones
swirl center	DEFINE_DYNAMIC_ZONE_PROPERTY	In-Cylinder Output Controls
varying cell layering height	DEFINE_DYNAMIC_ZONE_PROPERTY	Dynamic Mesh Zones
mesh motion	DEFINE_GRID_MOTION	Dynamic Mesh Zones
geometry deformation	DEFINE_GEOM	Dynamic Mesh Zones
properties for Six Degrees of Freedom (SDOF) Solver	DEFINE_SDOF_PROPERTIES	Dynamic Mesh Zones