Directed transport of a particle on a horizontal surface under asymmetric vibrations

Vibrational manipulation of dry granular materials in lab-on-a-chip devices

“…This type of temporal symmetry breaking has long been recognized in the context of condensed matter physics, 25–27 quantum mechanics, 28,29 and nonlinear optics, 30–32 where it is well established that driving forces that lack shift symmetry can induce a net current in one direction. Temporal symmetry breaking has also been recognized as a potential means of moving objects via frictional interactions on vibrating surfaces, 33–36 with prior experimental demonstrations involving isolated objects like coins 37–39 or centimeter scale plastic rods. Surprisingly, to date no prior work has investigated temporal symmetry breaking with granular media; the behavior of a granular ensemble experiencing a multimodal vibrational force remains unclear.…”

“…Temporal symmetry breaking has also been recognized as a potential means of moving objects via frictional interactions on vibrating surfaces, [33][34][35][36] with prior experimental demonstrations involving isolated objects like coins [37][38][39] or centimeter scale plastic rods. Surprisingly, to date no prior work has investigated temporal symmetry breaking with granular media; the behavior of a granular ensemble experiencing a multimodal vibrational force remains unclear.…”

Investigation of the Motion Characteristics of Parts on a Platform Subjected to Planar Oscillations

“…The motion of parts was achieved through net friction forces caused by horizontal and vertical oscillations of the individual surface elements. Nath et al [35] applied a platform subjected to spatially asymmetric lateral biharmonic oscillations to achieve a directed motion of parts due to the ratchet effect, which occurs when the driving force overcomes the threshold of static friction asymmetrically.…”