capillary action

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Related to Capillary force: surface tension, Capillary pressure

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 ?
The gravity force becomes the main driving force, which might not be large enough to overcome the capillary force in the reservoir.
Efforts at developing selective catalytic reduction systems for diesels could be helped by deploying capillary force vaporizers to inject controlled, homogeneous charges of diesel fuel or liquid urea onto catalyst surfaces.
c] is the viscosity of the continues phase, a is the radius of the droplet, and [GAMMA] is the capillary force.
The liquid condensate then returns to the heated end by a wick fixed to the inside wall of the tube, wherein capillary force returns the condensate to the evaporation section.
The flux must be sprayed on the board and flow into the barrels by its capillary force.
11) pointed out as the macro-flow velocity was sufficiently low the micro-flow front might advance ahead of the macro-flow front by the action of the capillary force.
Capillary forces between the small particles make the resulting structure very dense and give it a slightly shrunken component that is essentially full density with tensile and hardness properties equivalent to handbook values.
Smaller mammals are challenged during urination by high viscous and capillary forces that limit their urine to single drops.

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