Modeling viscous drag in binary fluid mixtures

We define a lattice Boltzmann algorithm for two-fluid hydrodynamics which includes viscous coupling between the two fluid components. Hence we show that, when an oscillatory shear is applied to one of the components, a pattern of vortices is set up which establishes concentration modulations even within the mixed phase. (C) 2000 Elsevier Science B.V. All rights reserved.