capillary action

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Related to Capillary force: surface tension, Capillary pressure

capillary action

[′kap·ə‚ler·ē ′ak·shən]
(fluid mechanics)

capillary action, capillarity

1.The movement of a liquid in the interstices of soil or other porous material, as a result of surface tension.
2. The phenomenon responsible for dry soil sucking up moisture above the ground water level. Also see capillary flow.
References in periodicals archive ?
Liquid fuel was driven into the fuel cell using capillary force without any extra pump.
This can be explained by (1): the larger the sand grain size, the smaller the capillary force. To overcome the viscous force of bound water during capillary rise, that is, if [I.sub.0] = 0, [h.sub.c] = [p.sub.c] with small capillary rise heights, the grain size is a controlling factor.
This in turn reduces the adhesion forces between particles and the substrate causing the meniscus capillary forces to effectively remove the largest diamond crystals from the PAAO membrane with a net force [F.sub.R].
Capillary number which denotes viscous force diving capillary force is the main factor affecting displacement efficiency.
As expected, with the increase of the sample permeability, the capillary force [p.sub.c50] is reduced.
The Capillary Force and Buoyancy Force were evaluated using equations (5a) and (5b) which are shown as follows:
"The same principle under water remains an exciting perspective, because without air there is no capillary force. The beetle shows us how to do it.
Hence, it remained the vertical flow of infiltration depth due to capillary force and gravity force (one-dimensional infiltration depth) as stated by Equation 4.
The role of the capillary force will not be considered in our analysis because the meniscus curvature induced by the gravitational force around the nanometre-sized particles is negligible.
Only capillary force is used to move fluid through the chip.
Their concept is inspired by plants, which use tiny pore openings--stomata--to evaporate water, generating a capillary force for cooling the leaf surface and distributing nutrients.
Vapore Inc., Richmond, CA, has announced the availability of its Capillary Force Vaporizer (CFV), a compact, heat-powered device that generates a powerful jet of pressurized vapor from un-pressurized liquid--with no moving parts.

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