Anisotropy in Phase Boundary Energy

    Anisotropy in phase boundary energy introduces orientation dependence and influences the patterns.  The following sequence is an example.  In this example the phase boundary energy is assumed  in the frequency space.  h is the parameter that has been discussed before.  q  is the angle of a unit vector in the frequency space relative to one of its axes.  In the following calculation, r is taken to be 0.1.  All the other parameters are the same as previous calculations with isotropic surface stress for average concentration 0.4.

(The average concentration is taken to be 0.4.  The initial condition is set to fluctuate randomly within 0.001 from the average.  The time unit in the figures is t.  The size of each figure is 256b´256b.  In the simulation, W and Q are taken to be 2.2 and 1, respectively)