Capillarity adhesion tension

This equation has been known for over a century it was given by Young2 (without proof ) and by Dupre 3 it can be deduced also from Laplace s theory of Capillarity, or indeed from any theory of the cohesive forces, since it can be obtained from consideration of energies only. Until recent years it has been little noticed, which is unfortunate, as the meaning of the contact angles is much clarified when the work of adhesion is introduced, and the surface tensions of the solid surfaces, which are not measurable, are eliminated. Most authors are now, however, expressing their results in terms of the work of adhesion or of closely related expressions. 

Surface tension results from an uneven distribution of attractive forces. A liquid displays capillarity when adhesive forces are stronger than cohesive forces. 

In his classic investigation of capillarity, Laplace [76] explained the adhesion of liquids to solids in terms of central fields of force between the volume elements of a continuous medium. This approach was illuminating about the origin of surface tension and energy and their relation to the internal pressure, and it resulted in the fundamental differential equation of capillarity which has been the basis of all... 

Surface Tension, Capillarity, and Contact Angle, Fig. 1 Adhesive and cohesive forces on molecules of a liquid close to an interface and away from it... 

Fiber capillary action Apart from improved adsorption of biological fluids thanks to fiber high surface ratio, capillary action of fibers also contributes to cells adhesion onto the fibrous implantable medical device. Capillarity is the action by which pores in a solid transport liquid on contact, so that tissue fluids transfer from the wet end to the dry end. The kinetics of the fluid transport are governed by the surface tension... 

Surface tension (called cohesion) and the natural tendency of water to wet solid surfaces (called adhesion) result in capillarity, which allows water to climb a tube or wall. If water had a weaker surface tension (and consequently weaker capillary forces), water in the soil would not be able to overcome gravity, and plant life would die. 

Surface tension is a measure of the energy required to increase a liquid s surface area. Greater intermolecular forces within a liquid create higher surface tension. Capillarity, the rising of a liquid through a narrow space, occurs when the forces between a liquid and a surface (adhesive) are greater than those within the liquid... 

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