Classical Preedericksz transitions

A similar calculation to that involved in deriving the equilibrium equation (3.111) for the first classical Preedericksz transition shows that the equilibrium equation for this example is... 

The solution = 0 is a solution to the bulk equilibrium equation (3.248) and the boundary condition (3.252) when Oq = 0. However, as in the classical Preedericksz transitions, there is also the possibility of a distorted solution for H 0. Integrating (3.248) and using the conditions (3.243) and (3.247) provides the solution... 

Section 5.9 introduces the dynamics of the Preedericksz transition in the classical geometries described in Chapter 3 in Section 3.4.1. The switch-on and switch-off times will be defined when flow is considered to be negligible in the usual twist geometry, as detailed in Section 5.9.1. In some instances, however, flow turns out to be quite influential and leads to the phenomena of backflow and kickback y as to be discussed in detail in the case of the splay geometry in Section 5.9.2. Backflow in the bend geometry is discussed in Section 5.9.3. 

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