20.500.12556/RUL-101615 Effects of flow on the dynamics of a ferromagnetic nematic liquid crystal We investigate the effects of flow on the dynamics of ferromagnetic nematic liquid crystals. As a model we study the coupled dynamics of the magnetization, M, the director field, n, associated with the liquid crystalline orientational order and the velocity field v. We evaluate how simple shear flow in a ferromagnetic nematic is modified in the presence of small external magnetic fields and we make experimentally testable predictions for the resulting effective shear viscosity: an increase by a factor of two in a magnetic field of about 20 mT. Flow alignment, a characteristic feature of classical uniaxial nematic liquid crystals, is analyzed for ferromagnetic nematics for the two cases of a magnetization in or perpendicular to the shear plane. In the former case we find that small in-plane magnetic fields are suffcient to suppress tumbling and that thus the boundary between flow alignment and tumbling can be controlled easily. In the latter case we furthermore find a possibility of flow alignment in a regime for which one obtains tumbling for the pure nematic component. We derive the analogues of the three Miesowicz viscosities well-known from usual nematic liquid crystals, corresponding to nine different configurations. Combinations of these can be used to determine several dynamic coeffcients experimentally. condensed matter physics nematic liquid crystals ferromagnetic liquid crystals fluid dynamics complex fluids fizika kondenzirane snovi nematski tekoči kristali feromagnetni tekoči kristali dinamika tekočin kompleksne tekočine true false false Angleški jezik Slovenski jezik Neznano 2018-06-21 11:38:52 2018-06-21 11:38:53 2022-08-14 03:45:23 0000-00-00 00:00:00 2018 0 0 Str. 042705-1-042705-13 iss. 4 Vol. 97 2018 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532.5:538.9 2470-0045 10.1103/PhysRevE.97.042705 3200356 2048366611 RAZ_Potisk_Tilen_i2018.pdf RAZ_Potisk_Tilen_i2018.pdf 1 8AA99D80F89C4303BAA711327F3BB07C 52c4a1d2b7979667195862a55fce499eac816a059008b8dd0af7d2f1c1c4c7f7 550c6a7a-a1b5-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=111730 Fakulteta za matematiko in fiziko 0 0 0