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Inertial delay of self-propelled particles.

ABSTRACT: The motion of self-propelled massive particles through a gaseous medium is dominated by inertial effects. Examples include vibrated granulates, activated complex plasmas and flying insects. However, inertia is usually neglected in standard models. Here, we experimentally demonstrate the significance of inertia on macroscopic self-propelled particles. We observe a distinct inertial delay between orientation and velocity of particles, originating from the finite relaxation times in the system. This effect is fully explained by an underdamped generalisation of the Langevin model of active Brownian motion. In stark contrast to passive systems, the inertial delay profoundly influences the long-time dynamics and enables new fundamental strategies for controlling self-propulsion in active matter.

SUBMITTER: Scholz C

PROVIDER: S-EPMC6279816 | biostudies-other | 2018 Dec

REPOSITORIES: biostudies-other

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Inertial delay of self-propelled particles.

Scholz Christian C Jahanshahi Soudeh S Ldov Anton A Löwen Hartmut H

Nature communications 20181204 1

The motion of self-propelled massive particles through a gaseous medium is dominated by inertial effects. Examples include vibrated granulates, activated complex plasmas and flying insects. However, inertia is usually neglected in standard models. Here, we experimentally demonstrate the significance of inertia on macroscopic self-propelled particles. We observe a distinct inertial delay between orientation and velocity of particles, originating from the finite relaxation times in the system. Thi ...[more]

PMID: 30514839

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