Chirality, anisotropic viscosity and elastic anisotropy in three-dimensional active nematic turbulence

Kralj, Nika (avtor), Ravnik, Miha (avtor), Kos, Žiga (avtor)

Various active materials exhibit strong spatio-temporal variability of their orientational order known as active turbulence, characterised by irregular and chaotic motion of topological defects, including colloidal suspensions, biofilaments, and bacterial colonies.In particular in three dimensions, it has not yet been explored how active turbulence responds to changes in material parameters and chirality.Here, we present a numerical study of three-dimensional (3D) active nematic turbulence, examining the influence of main material constants: (i) the flow-alignment viscosity, (ii) the magnitude and anisotropy of elastic deformation modes (elastic constants), and (iii) the chirality. Specifically, this main parameter space covers contractile or extensile, flow-aligning or flow tumbling, chiral or achiral elastically anisotropic active nematic fluids. The results are presented using time- and space-averaged fields of defect density and mean square velocity. The results also discuss defect density and mean square velocity as possible effective order parameters in chiral active nematics, distinguishing two chiral nematic states—active nematic blue phase and chiral active turbulence. This research contributes to the understanding of active turbulence, providing a numerical main phase space parameter sweep to help guide future experimental design and use of active materials.

• Jezik: Angleški jezik
• Ključne besede: liquid crystals, active nematics, topological defects, active fluids
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Datum objave: 07.07.2024
• Leto izida: 2024
• Št. strani: 9 str.
• Številčenje: Vol. 7, art. no. 222
• PID: 20.500.12556/RUL-159745
• UDK: 538.9
• ISSN pri članku: 2399-3650
• DOI: 10.1038/s42005-024-01720-8
• COBISS.SI-ID: 202054403
• Datum objave v RUL: 22.07.2024

Gradivo je del revije

• Naslov: Communications physics
• Skrajšan naslov: Commun. phys.
• Založnik: Springer Nature
• ISSN: 2399-3650
• COBISS.SI-ID: 2048602387

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: tekoči kristali, aktivni nematiki, topološki defekti, aktivne tekočine