Flow visualization 
Procedure:
- Start the smoke generator and connect it to smoke injector.
- Mount a model (cylinder or airfoil) in the wind tunnel test section.
- Start the wind tunnel and setup a velocity.
- Observe and record the flow structures.
- Observe the different flow structures:
- Difference between the flow structure of different size of cylinder
- Change in flow structure with increase in angle of attack of airfoil