capillary action

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Related to Capillary Effect: capillary tube, surface tension

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 ?
Based on the flow visualization experiment, the quasi-equilibrium capillary effect is limited, i.e., the dynamic effects on contact angle can be neglected, as the modified capillary number is about O([10.sup.-4]).
(2) the wet zone appears on the cold side of the medium and the front of condensation extends from this position towards the open side by capillary effects;
It is, therefore, the main objective of this work to study in a comprehensive way the capillary flow of an LDPE melt both experimentally and numerically by considering all possible capillary effects, combined and separately.
Seventeen chapters cover basic concepts, governing equations, basic flow solutions, hydraulic resistance and compliance, diffusion, time-dependent flow, capillary effects, electrohydrodynamics, electroosmosis, dielectrophoresis, magnetophoresis, thermal transfer, two-phase flow, complex flow patterns, acoustofluidics, optofluidics, and nanofluidics.
Jun Zeng of Coventor, Cambridge, Mass., and other researchers recently used computational fluid dynamics (CFD) to simulate a microfluidic valve utilizing capillary effects. The simulation results showed excellent correlation with experimental results.
Besides pure academic interest, understanding and description of the capillary effects has practical applications in a variety of fields including membrane technology, bioengineering, environmental control, etc.

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