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Monte Carlo simulations of lattice spin models are employed to investigate the creation of inversion walls in nematic films with specific boundary conditions. The simulations, based on the well known Lebwohl-Lasher potential, allow to produce simulated polarized microscopy images which are followed during their evolution and analysed for different film thicknesses. [ABSTRACT FROM AUTHOR]

Monte Carlo simulations of polarizing microscope textures for confined nematic droplets are presented. We consider uniaxial and biaxial cases with various boundary conditions and different values of the molecular biaxiality. The analysis of these optical textures should be of interest in assigning and characterizing biaxial nematic system, an issue of great current interest. [ABSTRACT FROM AUTHOR]

We present a detailed computer simulation study of the formation and evolution of topological defects in thin 3D nematic films with schlieren geometry. The differences between the uniaxial and the biaxial case and the influence of the strength of anchoring to the surfaces are analyzed. [ABSTRACT FROM AUTHOR]