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 ?
Even under ideal conditions, simple capillary rise would draw in nectar much more slowly, only about 36 centimeters per second, the researchers report.
The experimental variables can be closely controlled in this technique and the capillary rise theory has been widely used in the literature with considerable exactitude.
Furthermore, few other studies cited in the literature also justify the use of zero contact angles in capillary rise IFT calculations under the instances where the liquid completely wets the solid surface (Danesh et al.
where L is the capillary rise height, t is the time, [K.
The lower maximum rate of capillary rise according to watering front and higher reserve of porous volume of ceramics, which effective porosity is higher than 26%, we select, the higher value of drying in the electrical stove we obtain.
max]--maximum rate of capillary rise according to watering front, g--capillary rate of mass flow, [W.
Under the conditions experienced at central Queensland coal mines, mulches needed to be incorporated into the spoil at rates sufficient to improve surface infiltration and subsurface permeability to a depth that would mitigate against capillary rise during drying cycles.
Part G is the light source and part H is the digital video camera used to record the capillary rise observed in the capillary tube inside the optical cell.
Rolling presses the soil, it crushes the clods, it reduces the volume of non-capillaries and thus increases the capillary rise of water.
The method used in this work is the capillary rise of a liquid through packed powder, a phenomenon governed by the Washburn's equation.
where h is the capillary rise of the infiltrant between the walls, [gamma] and [rho] are the surface tension and density, respectively, of the molten infiltrant, and g is the acceleration of gravity.