Hydrodynamics of binary fluid phase segregation

In order to derive a quantitative description of the velocity field involving the interface between two phases of macroscopic size, the case in which the fluid is already well segregated with sharp interfaces between the different phases was considered. Direct simulations for the time evolution of simple hydrodynamical flows were carried out. The results were compared with the behavior based on the linearized version of the hydrodynamic equiations recently considered for studying coarsening dynamics