“…The first category of flows are those where oscillatory motion enables instantaneous local velocities or shear rates without net displacement, which is usually implemented to reduce device footprint and allow for prolonged observation [7,15,32,33]. The second category of flows are those that utilize steady rectified flows associated with an underlying primary high frequency oscillatory flow [34], which have been shown to be useful in mixing [2], hydrodynamic manipulation of particles and cells [4,18,35], and more recently, in microrheology [11,12]. Here, we demonstrate two specific applications of the oscillatory driver from each category, namely, inertial focusing from the former and mixing from the latter, using simple prototypical microfluidic configurations.…”