Exit Streamlets

Flow Streamlet Visualization Results Performed on the 8th of November, 1:30 - 7:30 PM All pictures were taken using the following configuration with a Nikon Coolpix 990 camera Speed: 1/30 s Aperture: f/3.4 Laser: ~50% Focal Length: 15 cm ISO: 400 During this most recent set of flow visualizations, streamlet photos were transferred to a gray scale format which allowed for extensive image processing and streamlet density analysis
		This is a well formed 10 cm/s flow with two defined flow streamlets and a vacant section at the center of the flow. Only light eddy motion is present near the edges of the flow compared to what was seen in faster flows.
		This picture shows particles which had recently been expelled into the chamber at 10 cm/s falling and contacting an exiting plume. They have formed a semi-stable layer of particles in mid-air.
		This first 20 cm/s flow seems to be encountering large scale eddy motion at its edges which have caused the well defined streamlets at the outlet to become wide sheets of particles beyond the eddies.
		The second 20 cm/s flow is an example of the crosswind effects which were encountered during the experiment. Due to circulating currents within the collection tube, the exiting streams have been diverted to the side of the outlet and away from the laser sheet plane.
		This 30 cm/s flow was well defined throughout the full length of the viewing chamber, however, the separation of the resonator seems to have become less efficient at this higher speed, as a muted wash of particles are visible across the gap between streamlets.
		Similar to the previous example of 30 cm/s flow, this visualization showed two weakly defined streamlets at the boundaries of the resonator exit and a wash of other particles spaced between them.