Initial stage of nematic twist-straining in strong magnetic field

The initial stage of straining of a planar-oriented nematic liquid crystal (NLC) cell in a strong magnetic field parallel to substrates is theoretically analyzed. It is pointed out that, in this case, the influence of boundaries on the development of instability is insignificant. Equations that describe the dynamics of NLC straining with allowance for flows are obtained in the framework of the Ericksen-Leslie-Parodi theory. It is established that simple wave solutions of these equations can be obtained in the given system geometry.