20.500.12556/RUL-155036 Symmetrically pulsating bubbles swim in an anisotropic fluid by nematodynamics Swimming in low-Reynolds-number fluids requires the breaking of timereversal symmetry and centrosymmetry. Microswimmers, often with asymmetric shapes, exhibit nonreciprocal motions or exploit nonequilibrium processes to propel. The role of the surrounding fluid has also attracted attention because viscoelastic, non-Newtonian, and anisotropic properties of fluids matter in propulsion efficiency and navigation. Here, we experimentally demonstrate that anisotropic fluids, nematic liquid crystals (NLC), can make a pulsating spherical bubble swim despite its centrosymmetric shape and timesymmetric motion. The NLC breaks the centrosymmetry by a deformed nematicdirector fieldwithatopologicaldefectaccompanyingthebubble.The nematodynamics renders the nonreciprocity in the pulsation-induced fluid f low. We also report speed enhancement by confinement and the propulsion of another symmetry-broken bubble dressed by a bent disclination. Our experiments and theory propose another possible mechanism of moving bodies in complex fluids by spatiotemporal symmetry breaking. hydrodynamics complex fluids hidrodinamika kompleksne tekočine true false true Angleški jezik Slovenski jezik Članek v reviji 2024-03-15 15:13:23 2024-03-15 15:13:24 2024-04-02 11:52:17 0000-00-00 00:00:00 2024 0 0 8 str. art. no. ǂ1220 Vol. 15 Feb. 2024 0000-00-00 Zaloznikova NiDoloceno NiDoloceno 0000-00-00 0000-00-00 2024-02-09 532.5 2041-1723 10.1038/s41467-024-45597-1 189133059 s41467-024-45597-1.pdf s41467-024-45597-1.pdf 1 B62268F1793ED2431D5B7CC21B39E0C5 bf0646aef45b932e6949164d51771db5ed56b07f1b53426e678a5b63c71013df 5b9db136-e2d6-11ee-a613-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=181761 https://www.nature.com/articles/s41467-024-45597-1 0 6463e094-e2d6-11ee-a613-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=181762 Fakulteta za matematiko in fiziko 0 0 0