Diffusiophoresis in a Near-critical Binary Fluid Mixture
arXiv:2111.12319 · doi:10.1063/5.0082991
Abstract
We suppose that a rigid spherical particle is put into a binary fluid mixture with the critical composition in the homogeneous phase near the demixing critical point. A short-range interaction is assumed between each component and the particle surface, and one component is assumed to be attracted more than the other by the surface. The adsorption layer, where the preferred component is more concentrated, can be significantly thick owing to a large susceptibility. In this situation, an imposed composition gradient causes a particle motion, i.e., diffusiophoresis emerges from a mechanism not considered previously. We calculate how the mobility depends on the temperature and particle size.
arXiv comment7 pages, 4 figures
References in corpus (12)
- Critical Phenomena and Renormalization-Group Theory
- Microswimmers in Patterned Environments
- The Theory of Boundary Critical Phenomena
- Osmosis, from molecular insights to large-scale applications
- Nonequilibrium critical Casimir interactions in binary fluids
- Casimir amplitudes and capillary condensation of near-critical fluids between parallel plates: Renormalized local functional theory
- Motion of an active particle in a linear concentration gradient
- Drag Coefficient of a Rigid Spherical Particle in a Near-Critical Binary Fluid Mixture beyond the Regime of the Gaussian Model
- Challenges in modelling diffusiophoretic transport
- Critical adsorption profiles around a sphere and a cylinder in a fluid at criticality: Local functional theory
- Undulation Amplitude of a Fluid Membrane in a Near-Critical Binary Fluid Mixture Calculated beyond the Gaussian Model Supposing Weak Preferential Attraction
- Isothermal transport of a near-critical binary fluid mixture through a capillary tube with the preferential adsorption