Vincenzo J. Pratley (Avtor), Enej Caf (Avtor), Miha Ravnik (Avtor), Gareth P. Alexander (Avtor)

Povzetek

Active nematics are driven, non-equilibrium systems relevant to biological processes including tissue mechanics and morphogenesis, and to active metamaterials in general. We study the three-dimensional spontaneous flow transition of an active nematic in an infinite slab geometry using a combination of numerics and analytics. We show that it is determined by the interplay of two eigenmodes – called S- and D-mode – that are unstable at the same activity threshold and spontaneously breaks both rotational symmetry and chiral symmetry. The onset of the unstable modes is described by a non-Hermitian integro-differential operator, which we determine their exponential growth rates from using perturbation theory. The S-mode is the fastest growing. After it reaches a finite amplitude, the growth of the D-mode is anisotropic, being promoted perpendicular to the S-mode and suppressed parallel to it, forming a steady state with a full three-dimensional director field and a well-defined chirality. Lastly, we derive a model of the leading-order time evolution of the system close to the activity threshold.

Ključne besede

nematske tekočine;aktivni nematiki;nematic fluids;active nematics;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FMF - Fakulteta za matematiko in fiziko
UDK: 532.5
COBISS: 194618883 Povezava se bo odprla v novem oknu
ISSN: 2399-3650
Št. ogledov: 12
Št. prenosov: 2
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: nematske tekočine;aktivni nematiki;
Vrsta dela (COBISS): Članek v reviji
Strani: 13 str.
Letnik: ǂVol. ǂ7
Zvezek: ǂart. no. ǂ127
Čas izdaje: Apr. 2024
DOI: 10.1038/s42005-024-01611-y
ID: 23628157