Above: A Von Karman vortex street downwind of the Canary Island chain in the eastern Atlantic Ocean off the coast of Africa on Feb. 27, 2015. Image credit: NASA Worldview. Editor's note ...

The series or pattern created by the vortex swirls is known as "a von Karman vortex street." The volume flow rate (assuming steady-state upstream flow) is is the a constant for all fluids given design ...