[1] Entrainment is important in turbulent jets, plumes, and gravity currents, and is an ongoing topic of research.
He was studying the use of oil drum fires to clear fog from airplane runways during World War II.
[3] It became a common model of turbulence closure used in environmental and geophysical fluid mechanics.
They are used on board ships to pump out flooded compartments: seawater is pumped to the eductor and forced through a jet, and any fluid at the inlet of the eductor is carried along to the outlet, and then up and out of the compartment.
Eductors can pump out whatever can flow through them, including water, oil, and small pieces of wood.