Displacement of Liquids in Capillaries

Imbibition and Flow of Wetting Liquids in Noncircular Capillaries

Micromolding in capillaries (MIMIC) has been used to study the dynamics of imbibition of liquid prepolymers in micrometer-scale, rectangular capillaries formed between an elastomer containing relief structures and a self-assembled monolayer (SAM) of alkanethiolates on gold supported on Si/SiO2. Self-assembled monolayers provide a wide range of solid/vapor interfacial free energies (γSV) and a c...

Spontaneous Penetration of Liquids into Capillaries and Porous Membranes Revisited.

A critical review of the problem of spontaneous penetration of a wetting liquid into pore channels shows that no theory exists to quantitatively predict the initial stage of imbibition. Since C. H. Bosanquet (1923, Phil. Mag. 45, 525), the theory operates with an universal velocity U(Bosanquet)=(2gammacosstraight thetarhor(1/2), with gamma being the surface tension, straight theta the contact a...

Triggering vacuum capillaries for pneumatic pumping and metering liquids in point-of-care immunoassays.

An innovative vacuum capillary pneumatic actuation concept that can be used for point-of-care testing has been investigated. The vacuum glass capillaries are encapsulated within a laminated pouch and incorporated into the fluidic card. Vacuum glass capillaries broken by external force such as finger pressure, generate the pneumatic forces to induce liquid flow in the fluidic system. The sizes o...

Simulstion of Gas Diffusion in Capillaries and Porous Solids

Simulstion of Gas Diffusion in Capillaries and Porous Solids