Isothermal transport of a near-critical binary fluid mixture through a capillary tube with the preferential adsorption

We study isothermal transport of a nonelectrolyte binary fluid mixture, which lies in the homogeneous phase near demixing critical point, through capillary tube connecting two reservoirs. Usually, one component is preferentially adsorbed onto wall, and adsorption becomes significant owing to large osmotic susceptibility. The mixture flowing out rich preferred when flow driven by pressure difference between When mass-fraction difference, total mass occurs presence preferential adsorption, means that diffusioosmosis emerges. These phenomena can be regarded as cross effects linked reciprocal relation. also these numerically using hydrodynamics based on coarse-grained free-energy functional, was previously obtained terms renormalized local functional theory. It shown particular conductance, or rate under given change non-monotonically with temperature.