SPINODAL DECOMPOSITION IN BINARY FLUIDS UNDER SHEAR-FLOW

We discuss the effects of shear rates on the structure, rheology and k inetics of phase separation in binary fluids through numerical Langevi n simulations ill both two- and three-dimensions. Our major findings a re as follows: (1) shear flow distorts the isotropy properties in norm al spinodal decomposition. Under stronger shear, a string phase appear s; (2) domains grow differently in directions parallel and perpendicul ar to the flow direction: (3) excess shear viscosities due to shear Bo w have a characteristic peak as a function of shear rates, We compare our findings with the experimental data and simulation results which d o not incorporate hydrodynamics.