Synthetic jet

In fluid dynamics, a synthetic jet flow — is a type of jet flow, which is made up of the surrounding fluid. Synthetic jets are generally formed by flow moving back and forth through a small opening. Synthetic jets are produced by periodic ejection and suction of fluid from an orifice induced by movement of a diaphragm inside a cavity among other ways.Synthetic jet flow can be developed in a number of ways, such as with an electromagnetic driver (e.g. plasma actuator), a piezoelectric driver, or even a mechanical driver such as a piston. Each moves a membrane or diaphragm up and down hundreds of times per second, sucking the surrounding fluid into a chamber and then expelling it. Although the mechanism is fairly simple, extremely fast cycling requires high-level engineering to produce a device that will last in industrial applications.