Dynamical response of a system of passive or active swimmers to time-periodic forcing
arXiv:1810.00964 · doi:10.1007/s10955-018-02216-w
Abstract
The presence of active forces in various biological and artificial systems may change how those systems behaves under forcing. We present a minimal model of a suspension of passive or active swimmers driven on the boundaries by time-dependent forcing. In particular, we consider a time-periodic drive from which we determine the linear response functions of the suspension. The meaning of these response functions are interpreted in terms of the storage and dissipation of energy through the particles within the system. We find that while a slowly driven active system responds in a way similar to a passive system with a re-defined diffusion constant, a rapidly driven active system exhibits a novel behavior related to a change in the motoring activity of the particles due to the external drive.
arXiv comment25 pages, 5 figures
References in corpus (16)
- Active Particles in Complex and Crowded Environments
- Motility-Induced Phase Separation
- Athermal Phase Separation of Self-Propelled Particles with no Alignment
- A bacterial ratchet motor
- Rheology of Active-Particle Suspensions
- Pressure is not a state function for generic active fluids
- Effective viscosity of microswimmer suspensions
- Microscopic theory for the phase separation of self-propelled repulsive disks
- Cooperative Motion of Active Brownian Spheres in Three-Dimensional Dense Suspensions
- Path Integral Approach to the Dynamic Casimir Effect with Fluctuating Boundaries
- Light Activated Self-Propelled Colloids
- Activity driven fluctuations in living cells
- Active polymer translocation through flickering pores
- Linear response and correlation of a self-propelled particle in the presence of external fields
- Pseudo energy wells in active systems
- Self-propulsion against a moving membrane: enhanced accumulation and drag force