When using domain initialization, you can optionally select a reference coordinate
frame other than the default Coord 0 frame in which to
have the solver interpret your initialization values. If a coordinate frame is not
specified, the domain coordinate frame is used (although it may be overridden, as
described below). Any variables used in the specification of an initialization value
are interpreted as follows:
x, y, z
local coordinate frame
other variables
global coordinate frame
You can select any predefined coordinate frame.
Information about making local coordinate frames is available in Coordinate Frames in the CFX-Pre User's Guide.
The coordinate frame used is local to initialization only and is used to interpret all x, y and z component values set on the Initialization panel.
Note: The coordinate frame set here may be ignored in some situations. For details, see Velocity Type.