Memory effects, arches and polar defect ordering at the cross-over from wet to dry active nematics

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

Memory effects, arches and polar defect ordering at the cross-over from wet to dry active nematics. / Nejad, Mehrana R.; Doostmohammadi, Amin; Yeomans, Julia M.

In: Soft Matter, Vol. 17, No. 9, 07.03.2021, p. 2500-2511.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Nejad, MR, Doostmohammadi, A & Yeomans, JM 2021, 'Memory effects, arches and polar defect ordering at the cross-over from wet to dry active nematics', Soft Matter, vol. 17, no. 9, pp. 2500-2511. https://doi.org/10.1039/d0sm01794a

APA

Nejad, M. R., Doostmohammadi, A., & Yeomans, J. M. (2021). Memory effects, arches and polar defect ordering at the cross-over from wet to dry active nematics. Soft Matter, 17(9), 2500-2511. https://doi.org/10.1039/d0sm01794a

Vancouver

Nejad MR, Doostmohammadi A, Yeomans JM. Memory effects, arches and polar defect ordering at the cross-over from wet to dry active nematics. Soft Matter. 2021 Mar 7;17(9):2500-2511. https://doi.org/10.1039/d0sm01794a

Author

Nejad, Mehrana R. ; Doostmohammadi, Amin ; Yeomans, Julia M. / Memory effects, arches and polar defect ordering at the cross-over from wet to dry active nematics. In: Soft Matter. 2021 ; Vol. 17, No. 9. pp. 2500-2511.

Bibtex

@article{0227ee8f5b3e453799ce90d217b94974,
title = "Memory effects, arches and polar defect ordering at the cross-over from wet to dry active nematics",
abstract = "We use analytic arguments and numerical solutions of the continuum, active nematohydrodynamic equations to study how friction alters the behaviour of active nematics. Concentrating on the case where there is nematic ordering in the passive limit, we show that, as the friction is increased, memory effects become more prominent and +1/2 topological defects leave increasingly persistent trails in the director field as they pass. The trails are preferential sites for defect formation and they tend to impose polar order on any new +1/2 defects. In the absence of noise and for high friction, it becomes very difficult to create defects, but trails formed by any defects present at the beginning of the simulations persist and organise into parallel arch-like patterns in the director field. We show aligned arches of equal width are approximate steady state solutions of the equations of motion which co-exist with the nematic state. We compare our results to other models in the literature, in particular dry systems with no hydrodynamics, where trails, arches and polar defect ordering have also been observed.",
author = "Nejad, {Mehrana R.} and Amin Doostmohammadi and Yeomans, {Julia M.}",
year = "2021",
month = mar,
day = "7",
doi = "10.1039/d0sm01794a",
language = "English",
volume = "17",
pages = "2500--2511",
journal = "Journal of Materials Chemistry",
issn = "1744-683X",
publisher = "Royal Society of Chemistry",
number = "9",

}

RIS

TY - JOUR

T1 - Memory effects, arches and polar defect ordering at the cross-over from wet to dry active nematics

AU - Nejad, Mehrana R.

AU - Doostmohammadi, Amin

AU - Yeomans, Julia M.

PY - 2021/3/7

Y1 - 2021/3/7

N2 - We use analytic arguments and numerical solutions of the continuum, active nematohydrodynamic equations to study how friction alters the behaviour of active nematics. Concentrating on the case where there is nematic ordering in the passive limit, we show that, as the friction is increased, memory effects become more prominent and +1/2 topological defects leave increasingly persistent trails in the director field as they pass. The trails are preferential sites for defect formation and they tend to impose polar order on any new +1/2 defects. In the absence of noise and for high friction, it becomes very difficult to create defects, but trails formed by any defects present at the beginning of the simulations persist and organise into parallel arch-like patterns in the director field. We show aligned arches of equal width are approximate steady state solutions of the equations of motion which co-exist with the nematic state. We compare our results to other models in the literature, in particular dry systems with no hydrodynamics, where trails, arches and polar defect ordering have also been observed.

AB - We use analytic arguments and numerical solutions of the continuum, active nematohydrodynamic equations to study how friction alters the behaviour of active nematics. Concentrating on the case where there is nematic ordering in the passive limit, we show that, as the friction is increased, memory effects become more prominent and +1/2 topological defects leave increasingly persistent trails in the director field as they pass. The trails are preferential sites for defect formation and they tend to impose polar order on any new +1/2 defects. In the absence of noise and for high friction, it becomes very difficult to create defects, but trails formed by any defects present at the beginning of the simulations persist and organise into parallel arch-like patterns in the director field. We show aligned arches of equal width are approximate steady state solutions of the equations of motion which co-exist with the nematic state. We compare our results to other models in the literature, in particular dry systems with no hydrodynamics, where trails, arches and polar defect ordering have also been observed.

U2 - 10.1039/d0sm01794a

DO - 10.1039/d0sm01794a

M3 - Journal article

C2 - 33503081

VL - 17

SP - 2500

EP - 2511

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

SN - 1744-683X

IS - 9

ER -

ID: 259823027