We consider the time evolution of a sessile drop volatile partially wetting liquid on rigid solid substrate. The evaporates under strong confinement, namely, it sits one two parallel plates that form narrow gap. First, we develop an efficient mesoscopic long-wave description in gradient dynamics form. It couples diffusive vertically averaged vapour density gap to equation for profile drop. unde...

The resonant modes of sessile water drops on a hydrophobic substrate subjected to a small-amplitude lateral vibration are investigated using computational fluid dynamic (CFD) modeling. As the substrate is vibrated laterally, its momentum diffuses within the Stokes layer of the drop. Above the Stokes layer, the competition between the inertial and Laplace forces causes the formation of capillary...

Abstract In order to investigate the influence of surface-active element on interfacial phenomena between molten iron and Al 2 O 3 -CaO-SiO slag, a mildly element, nitrogen, was introduced, were directly observed using an X-ray sessile drop method. The multiphysics model employed calculate velocity Marangoni convection caused by surface/interfacial tension gradient along with contour drop. Move...

Drying of a sessile drop of a complex liquid can lead to intriguing complex shapes. We report here a study dealing with a model system, made of a hydrosoluble polymer that is glassy when pure. Under solvent evaporation, polymers accumulate near the vapor/drop interface and may form a glassy skin, which bends as the volume of liquid it encloses decreases. The conditions for the occurrence of thi...

Evaporating liquid droplets are omnipresent in nature and technology, such as in inkjet printing, coating, deposition of materials, medical diagnostics, agriculture, the food industry, cosmetics, or spills of liquids. Whereas the evaporation of pure liquids, liquids with dispersed particles, or even liquid mixtures has intensively been studied over the past two decades, the evaporation of terna...

The evaporation of sessile drop investigated as quasi-state-process with mutual influence of temperature and vapor concentration taken into account. Problem was solved numerically, using mathematical model based on finite element method (FEM). The model was tested by comparison its results with experimental ones. The geometry of the droplet leads to nonuniform surface temperature distribution i...

Asymptotic solutions for large and small surface tension are developed for the profile of a symmetric sessile drop. The problem for large surface tension (i.e., small Bond number) is a regular perturbation problem, where the solution may be written as a uniformly valid asymptotic expansion. The problem for small surface tension (i.e., large Bond number) is a singular perturbation problem with b...

Suspensions of aerobic bacteria often develop flows from the interplay of chemotaxis and buoyancy. We find in sessile drops that flows related to those in the Boycott effect of sedimentation carry bioconvective plumes down the slanted meniscus and concentrate cells at the drop edge, while in pendant drops such self-concentration occurs at the bottom. On scales much larger than a cell, concentra...