Motor crosslinking augments elasticity in active nematics

Redford, Steven A.; Colen, Jonathan; Shivers, Jordan L.; Zemsky, Sasha; Molaei, Mehdi; Floyd, Carlos; Ruijgrok, Paul V.; Vitelli, Vincenzo; Bryant, Zev; Dinner, Aaron R.; Gardel, Margaret L.

doi:10.1039/d3sm01176c

Soft Matter

2024

DOI: 10.1039/d3sm01176c

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Motor crosslinking augments elasticity in active nematics

Steven A. Redford,

Jonathan Colen,

Jordan L. Shivers

et al.

Abstract: In active materials, uncoordinated internal stresses lead to emergent long-range flows. An understanding of how the behavior of active materials depends on mesoscopic (hydrodynamic) parameters is developing, but there remains...

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Mitigating density fluctuations in particle-based active nematic simulations

Kozhukhov,

Loewe,

Shendruk

2024

Commun Phys

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Understanding active matter has led to new perspectives on biophysics and non-equilibrium dynamics. However, the development of numerical tools for simulating active fluids capable of incorporating non-trivial boundaries or inclusions has lagged behind. Active particle-based methods, which typically excel at this, suffer from large density fluctuations that affect the dynamics of inclusions. To this end, we advance the Active-Nematic Multi-Particle Collision Dynamics algorithm, a particle-based method for simulating active nematics, by addressing the large density fluctuations that arise from activity. This paper introduces three activity formulations that mitigate the coupling between activity and local density. Local density fluctuations are decreased to a level comparable to the passive limit while retaining active nematic phenomenology and increasing the active turbulence regime four-fold in two dimensions. These developments extend the technique into a flexible tool for modeling active systems, including solutes and inclusions, with broad applications for the study of biophysical systems.

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Mitigating density fluctuations in particle-based active nematic simulations

Kozhukhov,

Loewe,

Shendruk

2024

Commun Phys

View full text Add to dashboard Cite

show abstract

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Motor crosslinking augments elasticity in active nematics

Abstract: In active materials, uncoordinated internal stresses lead to emergent long-range flows. An understanding of how the behavior of active materials depends on mesoscopic (hydrodynamic) parameters is developing, but there remains...

Cited by 1 publication

References 58 publications

Mitigating density fluctuations in particle-based active nematic simulations

Mitigating density fluctuations in particle-based active nematic simulations

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