A basic air flow device includes a flow passage having opposite ends. The flow passage is divided into a plurality of sequential portions between the ends including an inlet portion extending into the flow passage from an inlet end, an outlet portion disposed at the opposite end of the flow passage from the inlet portion, and at least one intermediate passage portion between the inlet passage portion and the outlet passage portion. Each of a plurality of divider sets are positioned in a different sequential portion of the passage to divide that passage portion into a predetermined number of sub passages, whereby the flow passage is sequentially divided into an increasing number of sub flow passages progressing from the inlet portion to the outlet portion. A larger device can be assembled using a parallel plurality of the basic devices.
