Abstract
The current understanding of flow separation and the control technologies by new generation actuators are reviewed. In particular, recent developments of the flow control devices such as synthetic jets and plasma jet are discussed, since the actuator induced flow structure has been well understood by the advanced sensing technologies. Emphasis is placed on the flow behavior around the actuator in the separated flow field. Finally, the review examines the passive and active flow control in the recent application where a backward facing step flow is selected as one of the most typical examples of flow separation and reattachment.
