Capillary imbibition in a square tube

Three periods of drying of a single square capillary tube.

The drying kinetics of a porous medium is classically described in three main periods, which depend on the interplay between the external and internal mass transfers during evaporation. The first period is described as essentially depending on the external mass transfer, whereas the third period is dominated by the internal mass transfer. The second period is a crossover period. We show experim...

Paramecium swimming in capillary tube

Related Articles Orientational order in concentrated suspensions of spherical microswimmers Phys. Fluids 23, 111702 (2011) Microfluidic droplet encapsulation of highly motile single zoospores for phenotypic screening of an antioomycete chemical Biomicrofluidics 5, 044103 (2011) Measuring oscillatory velocity fields due to swimming algae Phys. Fluids 23, 091112 (2011) Extensibility enables locom...

Capillary imbibition of aqueous foams by miscible and nonmiscible liquids.

When put in contact with a large liquid drop, dry foams wick owing to surface-tension-driven flows until reaching equilibrium. This work is devoted to the dynamics of this imbibition process. We consider imbibition of both wetting or nonwetting liquid, by putting the dry foam into contact either with the foaming solution that constitutes the foam or with organic oils. Indeed, with the appropria...

Square cells in gravitational and capillary thermoconvection

The onset of square convective cells in fluid layers heated from below is investigated. Amplitude equations are deduced from the Boussinesq equations and a standard stability analysis is performed. Square cells are shown to be preferred when the instability is mainly capillarity driven. The influence of the Prandtl and Biot numbers are examined. At small Pr, the Biot number has not very much in...

A Study on Capillary Tube Flow