As airflow cannot be seen by human eyes, various flow visualization techniques were invented to allow scientists and engineers to perceive a mental image of a flow about an object of interest. There are a number of flow visualizing techniques being used nowadays. For low speed wind tunnel testing, injecting smoke into the test section is one of the most often used flow visualization techniques. In this experiment, you will use the smoke flow visualization technique to observe the airflow pattern around the airfoil shape.