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When you create a probe it will take on the properties of the last probe you altered. Once
created,
you can change each probe’s properties individually.
6.1.3
Velocity Probe Properties
1.
Double-click on a probe to open the
PIV Probe Properties
dialog box. You can also right-
click on the probe and choose
Properties
to open the dialog box.
PIV Probe Properties dialog box
2.
Select the
Width
and
Height
of the probe window, the area over which statistics will be
calculated. Some guidelines for setting the probe window size are:
a.
Probes should typically be the same size in both x and y directions.
b.
Smaller probes require less processing power, so use smaller window sizes to run
more probes simultaneously.
c.
Increasing the probe size will improve the signal-to-noise ratio; decreasing the
size will increase spatial resolution.
d.
If the probe is located in a region of fast flow, the probe size must be large
enough that the correlation does not fall beyond the window. The
Cross-
Correlation
field (see below) can be an aid in setting the size.
