Numerical study of domain coarsening in anisotropic stripe patterns

摘要: We study the coarsening of two-dimensional smectic polycrystals characterized by grains oblique stripes with only two possible orientations. For this purpose, an anisotropic Swift-Hohenberg equation is solved. quenches close enough to onset stripe formation, average domain size increases time as t 1/2 . Further from onset, pinning forces similar Peierls stresses in solid crystals slow down defects, and growth becomes anisotropic. In a wide range quench depths, dislocation arrays remain mobile density roughly decays ˛1/3 , while chevron boundaries are totally pinned. discuss some agreements disagreements found recent experimental results on electroconvection patterns.