Spinodal decomposition of binary fluid mixtures with viscosity difference

The model H dynamics of Hohenberg and Halperin's notation are generalized f or phase separation of binary fluid mixtures with viscosity difference. We numerically examine the generalized model H in two-dimensional systems usin g a simple algorithm. Morphological changes due to the viscosity difference are observed in the late stage of spinodal decomposition under the critica l quench condition.