Fujitani, Youhei

I study hydrodynamics of near-critical binary fluid mixtures. When two components of a mixture differently interact with the surface of a colloid immersed in the mixture, the preferred component is significantly concentrated near the surface because of large osmotic susceptibility. In such a mixture, the drag coefficient of a colloidal particle becomes sensitive to temperature, and one can shift a colloidal particle by imposing gradients of composition and temperature.