  We study the coarsening dynamics of two and three dimensional biaxial nematic
liquid crystals, using Langevin dynamics. Unlike previous work, we use a model
with no a priori relationship among the three elastic constants associated with
director deformations. We find a rich variety of coarsening behavior, including
the simulataneous decay of nearly equal populations of the three classes of
half-integer disclination lines. The behavior we observed can be understood on
the basis of the relative values of the elastic constants and the resulting
decay channels of the defects.
