Open AccessDynamic of orientation processes in liquid crystal systems of technical devices
Author(s) -
A. N. Larionov,
Oleg I. Polivaev,
N. N. Larionova,
A. V. Mashina
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/659/1/012077
Subject(s) - liquid crystal , rotational viscosity , rotation around a fixed axis , viscosity , condensed matter physics , relaxation (psychology) , orientation (vector space) , materials science , magnetic field , volume (thermodynamics) , thermodynamics , classical mechanics , physics , geometry , composite material , psychology , social psychology , mathematics , quantum mechanics
The relaxation properties of nematic liquid crystals by the pulsed method of a fixed distance in a rotating magnetic field are investigated. The adequacy of the solution of the equation of motion of the nematic director in the conditions of asynchronous motion of the director and the magnetic field induction vector was experimentally confirmed. The values of the rotational viscosity coefficient and the orientation relaxation time that characterize the parameters of devices with a liquid-crystal working medium in a wide range of pressures and temperatures are calculated. In the framework of the free volume theory, the dependence of the rotational viscosity coefficient on temperature and pressure is analyzed.