1 Overview 2 Details of the Model Construction - Canada France ...

10 Lessons learned
• A dome shutter made of a transparent material would have been helpful and the same could be
said for the vent plugs; in some orientations the dome shutter or vent plugs considerably
blocked the view of the flow inside the dome.
• All aluminum parts on the inside of the dome (e.g. the dome floor) should have been painted
white to improve the contrast with the dye. The telescope would then have to be painted a
bright contrasting color to stand out against dome floor. Choice of this colour should be such
that it is not confused with any of the dyes used.
• The use of fluorescent or other lighting fixtures with a strong periodic intensity variation should
be avoided. In this case the 60 Hz frequency of the fluorescent panel intensity time variation
was a very close multiple of the 30 Hz camera frame rate which led to low frequency “beats” in
the background intensity that appear to have a chromatic component.
• A vent in the base of the model should have been provided to allow air to be released from
inside the dome when it is inverted in the water. In our tests we used a siphon to remove the air
from the dome, which was effective but very awkward.
• A model of the MKAM/weather tower would have been useful to see the effect of the dome
wake at this location.