Download VORTEX -NT USER MANUAL

The [DRAW] option takes all of the STREAMLINE settings and calls the display routine. In
displays with more than one window FLOWVIS will prompt for the target window in which to
display STREAMLINES. Streamline following will proceed until all of the streams have been
terminated or a number of cells have been stepped through. If there are still streams active when
the preset number of steps have been reached then FLOWVIS will prompt for streamlines to
continue for a similar number of steps.
The [<][>], [Min] and [Max] options allow the number of seeding points for Streamlines to be
selected. The specified number of seeds are then placed regularly in the selected seed region.
The seed region is a given 2-Dimensional plate within the domain.
The colours [<] and [>] options allow the number of colours used for following Streamlines to be
set. The default is the maximum number of colours available. This option only has effect
between the specified range of colours. It is used for limiting the number of colours used from a
potentially large range of colours.
The Colour Range upper limit [<][>] and lower limit [<][>] options allow the actual colour range
used to be selected. The colours range from red as the lowest number to blue which is the highest.
The range can be reduced, reversed or switched to white only by using the middle mouse key.
The seeding region [MENU...] option brings up a visual menu, similar to the main menu view
option, for selecting a streamline seeding 2-Dimensional plate. This plate can also be selected
using options in this menu. The plate (or slab) forms the region over which the streamline seeds
are placed.
The Streamline plane [NEW], [<] and [>] options allow the seeding slab to be changed to an X-,
Y- or a Z-plate and the number of the slab to be chosen. The streams will be seeded regularly over
the extent of this slab. For 2-Dimensional domains these options have no effect.
The seeding slab ranges [<][>][<][>] options can be used to reduce the extent of the seeding
region down from the whole plane to a sub-region. The extent is specified by cell indices and the
data-base directions are displayed above the ranges.
The Streamline [FOLLOW] option allows the direction in which the streamlines are followed to
be specified. When the streamlines are followed forwards the velocities are used as they are in
the data-base. Following backwards uses the negated velocity components found in the data-base.
The streamline [USING] option allows streams to be tracked in the whole domain or optionally
only in the current view selected region. If a seed starts outside of the region (or leaves the
region) it will not be followed any further.
The Stream steps [<] and [>] options allow the streamline refinement to be specified. This integer
value determines how accurately (and fast) the Streamlines are followed. The larger the value the
more steps are used to follow the Streams. More accuracy does mean that the stream following
will be slower.
The kill at edges option has not yet been implemented.
The stream colouring [USE] options allow the type of stream coloration to be selected. The
choices are for local resultant speed, single colour or using a data-base variable for coloration.
The colouring used is indicated just below the [DRAW] button.
The scroll [TOP], [LAST], [UP] and [DOWN] options allow other portions of the variable list to
be displayed. This is necessary where the full variable list is larger than the visible portion of the
list. The [USE] buttons allow the adjacent variable names to be selected.