One of the important phenomena in nature is capillarity.
The rate and extent of the action associated with capillarity
depends upon such factors as forces of cohesion
and adhesion, surface tension, and viscosity. Thus, the
capillarity depends both on the cohesion of the liquid
and on the adhesion of the liquid to the solid walls.
Hence, two divergent behaviours can be understood by
considering the intermolecular attraction between molecules
in the liquid, called ‘cohesion’, and the attraction
between the liquid and the solid wall, called ‘adhesion’14].
If adhesion is stronger than cohesion, the liquid will rise
along the walls. Conversely, if cohesion is greater than
adhesion, a depression of the liquid in the capillarity will
result.
The surface tension (c) of a liquid is the work done in
extending the surface of the liquid one unit area151. The
value of surface tension depends on which liquid and
fluid are in contact at the free surface of the liquid:
One of the important phenomena in nature is capillarity.The rate and extent of the action associated with capillaritydepends upon such factors as forces of cohesionand adhesion, surface tension, and viscosity. Thus, thecapillarity depends both on the cohesion of the liquidand on the adhesion of the liquid to the solid walls.Hence, two divergent behaviours can be understood byconsidering the intermolecular attraction between moleculesin the liquid, called ‘cohesion’, and the attractionbetween the liquid and the solid wall, called ‘adhesion’14].If adhesion is stronger than cohesion, the liquid will risealong the walls. Conversely, if cohesion is greater thanadhesion, a depression of the liquid in the capillarity willresult.The surface tension (c) of a liquid is the work done inextending the surface of the liquid one unit area151. Thevalue of surface tension depends on which liquid andfluid are in contact at the free surface of the liquid:
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One of the important phenomena in nature is capillarity.
The rate and extent of the action associated with capillarity
depends upon such factors as forces of cohesion
and adhesion, surface tension, and viscosity. Thus, the
capillarity depends both on the cohesion of the liquid
and on the adhesion of the liquid to the solid walls.
Hence, two divergent behaviours can be understood by
considering the intermolecular attraction between molecules
in the liquid, called ‘cohesion’, and the attraction
between the liquid and the solid wall, called ‘adhesion’14].
If adhesion is stronger than cohesion, the liquid will rise
along the walls. Conversely, if cohesion is greater than
adhesion, a depression of the liquid in the capillarity will
result.
The surface tension (c) of a liquid is the work done in
extending the surface of the liquid one unit area151. The
value of surface tension depends on which liquid and
fluid are in contact at the free surface of the liquid:
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