Curvature effects on the surface viscosity of nematic liquid crystals

摘要: Abstract We analyse the flow of a nematic liquid crystal close to cylindrical surface. As first result, we show that it is not possible decouple motion equations for director and macroscopic velocity. Nevertheless, derive an expression effective viscosity, which can be used in dynamic boundary condition linking time derivative gradient angle on The viscosity so obtained may greater or smaller than its planar counterpart, depending both concavity surface sign Leslie coefficients α2 α3. In particular, materials align shear, correction changes whether between normal exceeds critical value.