Note the difference between Pathlines and Streamlines and keep in mind that what you see is not an animation of the actual air movement: https://www.youtube.co

Note the difference between Pathlines and Streamlines and keep in mind that what you see is not an animation of the actual air movement: https://www.youtube.com/watch?v=OLSmNZm1e0k&feature=youtu.be&t=1870 https://www.youtube.com/watch?v=OLSmNZm1e0k&feature=youtu.be...