Tumbling instability in a shearing nematic liquid crystal: Analysis of broadband dielectric results and theoretical treatment

摘要: The rotational diffusion coefficient D⊥, the viscosity coefficients γi (i=1,2), and orientational relaxation time τ001 are investigated. calculated by a combination of an existing statistical–mechanical approach broadband experimental results complex permittivity for polar liquid crystal 4-n-octyl-4′-cyanobiphenyl (8CB). flow dynamic behavior nematic in shear flow, as well transition from alignment regime to tumbling instability also investigated 8CB near far away charged surface. angle θ(τ) its equilibrium θeq layer up ∼1.5 μm is using Ericksen–Leslie theory case planar at indium tin oxide-coated glass plate temperature range which exhibits phase. In accordance with earlier Couette experiments, our calculations show bulk nature hy...