=====Testing=====

===3/5===
The team went to the lab with some lighting equipment

|{{:start:classes:principlesofdesign:flow_visualization:dscn0657.jpg?450x450|}}||{{:start:classes:principlesofdesign:flow_visualization:dscn0661.jpg?450x450|}}||{{:start:classes:principlesofdesign:flow_visualization:dscn0663.jpg?450x450|}}|
|Lit with a blacklight. Pretty good contrast. Sadly, the smoke doesn't fluoresce.||Lit with regular lamp. Better position than previously. More clear than initial tests.||Lit with a regular lamp. The bending of the stream of gas is very clear.|

===2/28===
The team went in to test the viability of streamers as a flow visualization method. As a single, connected piece of material, a streamer did not give smooth and accurate portrayals of flow. Furthermore, it was difficult to photograph the streamers due to their erratic movement.

|{{:start:classes:principlesofdesign:flow_visualization:dscn0655.jpg?450x450}}||{{:start:classes:principlesofdesign:flow_visualization:dscn0652.jpg?450x450|}}|
|three streamer set up, gives an idea of how the flow looks||One streamer, first the flow pretty well, all things considered|

===2/27===
The team went to the lab armed with a bigger smoke generator. The resulting stream was much stronger.


|{{:start:classes:principlesofdesign:flow_visualization:dscn0646.jpg?450x450}}|{{:start:classes:principlesofdesign:flow_visualization:rotated.png?450x450}}|
|As the smoke bends according to obstacles, it remains clearly visible.|The smoke is entered slowly, but accelerates according to the air flow around it.|

|{{:start:classes:principlesofdesign:flow_visualization:dscn0648.jpg?450x450}}|{{:start:classes:principlesofdesign:flow_visualization:dscn0645.jpg?450x450}}|
|It was difficult to seal the very hot opening of the smoke machine.|Tubes present an easy answer to smoke delivery.|

===2/23===
We went into the lab on 2/23/2012 
Tried out the oil drop generator to see if the correspondence of inlet to test section is roughly 1 to 1. It basically is.
The difference in side to side seems more dramatic in the test section.

Here are some pictures of the PIV system in action:


|{{:start:classes:principlesofdesign:flow_visualization:wake.png?450x450}}|{{:start:classes:principlesofdesign:flow_visualization:wake2.png?450x450}}|{{:start:classes:principlesofdesign:flow_visualization:airfoil.png?450x450}}|
|First image.|Second image, taken quickly after the first image.|Third image, taken quickly after the second image.|

These successive images were used to generate a vector field for velocity.

|{{:start:classes:principlesofdesign:flow_visualization:vector_field.png?450x450}}|
|A vector field for the droplets of oil. The strange behavior on the left side of this diagram is useless data.|

The following are some tools we utilized.

|{{:start:classes:principlesofdesign:flow_visualization:img_20120223_171923.jpg?450x450}}|{{:start:classes:principlesofdesign:flow_visualization:img_20120223_172555.jpg?450x450}}|{{:start:classes:principlesofdesign:flow_visualization:img_20120223_172626.jpg?450x450}}|
|The current fog machine generates particles of olive oil.The motion is tracked by the camera as they pass through the laser field.|An airfoil we put in the wind tunnel. We tried to determine x-y correspondence of the wind tunnel inlet and test section.|Another view of the airfoil.|

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[[http://dap.cooper.edu/doku.php?id=start:classes:principlesofdesign:flow_visualization:start#team_members_and_individual_work/|{{:start:classes:principlesofdesign:flow_visualization:new_home_button.png?83x79|}}]]