content_image/336601.jpg
<img src='content_image/336601.jpg'>

ξ $^{2}$/Ma . Hydrodynamic interaction was not included and, therefore, coarsening of domains proceeded governed by the diffusion process, i.e., through the evaporation-condensation mechanism and the growth law L ( t ) ∼ t 1 / $^{3}$[5, 31, 32]. Once the well defined interfaces were formed, we looked for the fast processes permanently at work (like deformation of interface shapes through fast coagulation and break-up, etc.), which would give rise to new irreversible dynamics, going beyond the diffusion and hydrodynamic ones. 

The time evolution of the coarse-grained Doi-Ohta variables in Fig.1 is computed by a simple use of mappings (3.4). The shear viscosity, which arises from excess shear stress due to the domain interfaces, is related to the anisotropy element q$_{xy}$ through η = − q$_{xy}$/ ˙ γ . From the time evolution of the average interfacial width l , one can see that this new structural variable relaxes very quickly and is afterwards only affected by the flow through the convec- tive behavior, Eq.(3.16f). This numerical analysis shows that the coarse-grained Doi-Ohta variables fluctuate in time (with the time scale of ∼ 1 / ˙ γ ) around their average values due to the competition between the flow field and the ordering mechanisms, see Fig.1. This can be also seen in the time evolution of the morphology. The snapshots of the morphology, presented in Fig.2, show that at first domains are elongated due to the shear flow, which tends to orient them towards the shear direction. The elongation is then followed by coagu- 

