capillary action

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capillary action

the process involving molecular adhesion by which the surface of a liquid in a tube is either elevated or depressed, depending on the cohesiveness of the liquid molecules. The more cohesive the molecules, the more depressed will be the surface of the liquid. Less cohesive liquid molecules will adhere to the surfaces of the tube in which they are contained and elevate the surface of the liquid. Also called capillary attraction, capillarity.

capillary action

The spontaneous movement of a liquid up thin tubes, due to adhesive and cohesive forces and surface tension.

capillary action

A surface tension effect shown by the elevation or depression of a liquid at the region of contact with a solid, as in capillary tubes.
Synonym: capillarity
See also: action
References in periodicals archive ?
Prior to the microsphere measurements, the capillary flow cell was washed for several hours.
Capillary flow occurs in unsaturated soil, so is called unsaturated flow.
Nagel, and their coworkers at the James Franck Institute of the University of Chicago have now discovered that the widespread effect is due to a particular type of capillary flow.
n] term for closed Couette flow is analogous to the Rabinowitsch correction factor for capillary flow.
Also available are custom-designed tooling and a complete line of interchangeable dies and screws for capillary flow, blown film, wire coating, sheet, and profiles.
The onset of spontaneous capillary flow in open microfluidic systems
In combination with the sweeping frequency laser, it enhances sensitivity to areas with low blood flow, enabling clear images of retinal vascular pathology and fine capillary flow.
We couple the observations of worm melt fracture inducement and the rheological behavior in the capillary flow with the MWD difference of the HDPE resins in order to understand the origin and mechanism of the worm melt fracture.
These compact, benchtop units overcome earlier limitations of the capillary flow technique, including inaccurate pressure sensing, poor reproducibility and slow responsiveness.
Capillary flow pulls the cells into microchambers in one minute.
Capillary flow in the chip was measured in a stationary position.

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