Active particles with polar alignment in ring-shaped confinement

Fazli, Zahra; Naji, Ali

doi:10.1103/physreve.103.022601

Cited by 16 publications

(8 citation statements)

References 124 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…33 Further, chiral active particles with polar (i.e., ferromagnetic Heisenberg-like) interactions exhibit rotating macrodroplets, 34,35 chimera states, [36][37][38] chiral selfrecognition, 39 dynamical frustration, 40 or a surface-population reversal effect in ring-shaped confinement. 41 Additional effects can arise in the presence of a rotating magnetic field, where disk-shaped chiral active particles without anisotropic interactions can display chiral separation and polar ordering. 42 In the present study, we go one step further and consider chiral active particles with dipole-dipole interactions.…”

Section: Introductionmentioning

confidence: 99%

Emergent vortices and phase separation in systems of chiral active particles with dipolar interactions

Liao

Klapp

2021

Soft Matter

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Emergent vortices and phase separation in systems of chiral active particles with dipolar interactions

Liao

Klapp

2021

Soft Matter

View full text Add to dashboard Cite

show abstract

“… 26 , 29 , 30 , 53 , 54 and references therein). Although these phenomena are enabled and sustained by particle activity, they can arise only in the presence of interparticle and particle-wall interactions, including Vicsek 26 , 29 , 55 and Vicsek-like 56 – 59 alignment interactions and hydrodynamic interactions 57 , 60 . Most of the aforementioned phenomena can emerge in active systems with only short-ranged steric interactions between the constituent particles, signifying their generic nature.…”

Section: Introductionmentioning

confidence: 99%

“…Active bath-mediated interactions between suspended inclusions can substantially be affected also by the presence of any confining boundaries 51 , 77 , shape, mobility and concentrations 48 , 51 , 52 , 68 , 75 , 78 and, if present, dissimilarity 49 , 69 and permeability 52 , 79 of the inclusions. On the other hand, the shape of active particles itself plays a crucial role in determining their bulk properties 37 , 80 – 83 , near-wall accumulations at rigid 40 – 43 , 56 , 84 and deformable 85 – 87 boundaries and, hence, the active (or ‘swim’) pressure they exert on these boundaries 56 , 64 , 79 , 88 , 89 , and the effective interactions they mediate between external objects 47 , 66 , 68 , 69 . For instance, the nonequilibrium wall accumulation of self-propelled rods turns out to be weaker than that of self-propelled disks 41 , 42 .…”

Section: Introductionmentioning

confidence: 99%

Noncentral forces mediated between two inclusions in a bath of active Brownian rods

Sebtosheikh

Naji

2021

Sci Rep

Self Cite

View full text Add to dashboard Cite

Using Brownian Dynamics simulations, we study effective interactions mediated between two identical and impermeable disks (inclusions) immersed in a bath of identical, active (self-propelled), Brownian rods in two spatial dimensions, by assuming that the self-propulsion axis of the rods may generally deviate from their longitudinal axis. When the self-propulsion is transverse (perpendicular to the rod axis), the accumulation of active rods around the inclusions is significantly enhanced, causing a more expansive steric layering (ring formation) of the rods around the inclusions, as compared with the reference case of longitudinally self-propelling rods. As a result, the transversally self-propelling rods also mediate a significantly longer ranged effective interaction between the inclusions. The bath-mediated interaction arises due to the overlaps between the active-rod rings formed around the inclusions, as they are brought into small separations. When the self-propulsion axis is tilted relative to the rod axis, we find an asymmetric imbalance of active-rod accumulation around the inclusion dimer. This leads to a noncentral interaction, featuring an anti-parallel pair of transverse force components and, hence, a bath-mediated torque on the dimer.

show abstract

“…33 Further, chiral active particles with polar (i.e., ferromagnetic Heisenberg-like) interactions exhibit rotating macrodroplets, 34,35 chimera states, [36][37][38] chiral selfrecognition, 39 dynamical frustration, 40 or a surface-population reversal effect in ring-shaped confinement. 41 Additional effects can arise in the presence of a rotating magnetic field, where diskshaped chiral active particles without anisotropic interactions can display chiral separation and polar ordering. 42 In the present study, we go one step further and consider chiral active particles with dipole-dipole interactions.…”

Section: Introductionmentioning

confidence: 99%

Emergent vortices and phase separation in systems of chiral active particles with dipolar interactions

Liao,

Klapp

2021

Preprint

View full text Add to dashboard Cite

Using Brownian dynamics (BD) simulations we investigate the self-organization of a monolayer of chiral active particles with dipolar interactions. Each particle is driven by both, translational and rotational self-propulsion, and carries a permanent point dipole moment at its center. The direction of the translational propulsion for each particle is chosen to be parallel to its dipole moment. Simulations are performed at high dipolar coupling strength and a density below that related to motility-induced phase separation in simple active Brownian particles. Despite this restriction, we observe a wealth of phenomena including formation of two types of vortices, phase separation, and flocking transitions. To understand the appearance and disappearance of vortices in the many-particle system, we further investigate the dynamics of simple ring structures under the impact of self-propulsion. Recent research has shown that chiral motion (i.e., circle swimming) can indeed significantly change the self-assembly dynamics in active systems. Already for the simplest models of chiral active particles, it has been shown analytically and numerically

show abstract

Active particles with polar alignment in ring-shaped confinement

Cited by 16 publications

References 124 publications

Emergent vortices and phase separation in systems of chiral active particles with dipolar interactions

Emergent vortices and phase separation in systems of chiral active particles with dipolar interactions

Noncentral forces mediated between two inclusions in a bath of active Brownian rods

Emergent vortices and phase separation in systems of chiral active particles with dipolar interactions

Contact Info

Product

Resources

About