We study the flow generated by the periodic pitching motion of a 2D rigid plate about its fixed end in an unbounded incompressible fluid which is otherwise at rest, as a simple model of the operation of micro fans. The problem, which is inherently non-linear even for small-amplitude oscillations, is addressed within the framework of a semi-analytic model of inviscid flow incorporating concentrated vortex shedding at the free end. This semi-analytic model successfully predicts the longitudinal impulse imparted to the fluid in agreement with NS (FLUENT) simulations providing insight into the physical mechanisms underlying the primary contributions to the impulse.
The Flow Generated by an Oscillating Plate
Light refreshments will be served before the lecture
