  We investigate the capability of an active body (master) to manipulate a
passive object (slave) purely via contactless flow-mediated mechanisms,
motivated by potential applications in microfluidic devices and medicine (drug
delivery purposes). We extend prior works on active-passive cylinder pairs by
superimposing periodic oscillations to the master's linear motion. In a viscous
fluid, such oscillations produce an additional viscous streaming field, which
is leveraged for enhancing slave transport. We see that superimposing
oscillations robustly improves transport across a range of Reynolds numbers.
Comparison with results without oscillations highlights the flow mechanisms at
work, which we capitalize on to design (master) geometries for augmented
transport. These principles are found to extend to three-dimensional
active-passive shapes as well.
