20.500.12556/RUL-159745 Chirality, anisotropic viscosity and elastic anisotropy in three-dimensional active nematic turbulence 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. liquid crystals active nematics topological defects active fluids fluids tekoči kristali aktivni nematiki topološki defekti aktivne tekočine true false true Angleški jezik Slovenski jezik Članek v reviji 2024-07-22 09:22:39 2024-07-22 09:22:41 2025-01-22 14:50:29 0000-00-00 00:00:00 2024 0 0 9 str. art. 222 Vol. 7 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 538.9 2399-3650 10.1038/s42005-024-01720-8 202054403 s42005-024-01720-8.pdf s42005-024-01720-8.pdf 1 ABB19E8FEEC69E39B9277FED9F251155 d43e5e876fdd20ef387b722e58be3102a5dc5ba77358e782a4aa8b256af42d41 6496b915-47fb-11ef-8f74-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=187912 https://www.nature.com/articles/s42005-024-01720-8 0 6b9b4210-47fb-11ef-8f74-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=187913 Fakulteta za matematiko in fiziko 0 0 0