The “Dimensional analysis, conservation of volume and the filling box model” demonstration takes quite a while to run (say 10 minutes after setup) so a GIF of the video is too large to post here. The full 8 minute video from a test I ran can be found here. Below is a series of images from that test at various times showing the initial wavy interface which eventually settles down. In the test I ran I had trouble getting air bubbles out of the nozzle so the plume water comes out at a slight angle and from a very small area.
I have also included a GIF (full video here) of the constant head tank being turned on showing the water rising up and flowing over the weir wall.
An index of all the demonstrations posted on this blog can be found here. Don’t forget to follow @nbkaye on twitter for updates to this blog. If you have a demonstration that you use in class that you would like to share on this blog please email me (firstname.lastname@example.org). I also welcome comments (through the comments section or via email) on improving the demonstrations.