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  2. Surface tension - Wikipedia

    en.wikipedia.org/wiki/Surface_tension

    Surface tension is an important factor in the phenomenon of capillarity. Surface tension has the dimension of force per unit length, or of energy per unit area. [4] The two are equivalent, but when referring to energy per unit of area, it is common to use the term surface energy, which is a more general term in the sense that it applies also to ...

  3. Young–Laplace equation - Wikipedia

    en.wikipedia.org/wiki/Young–Laplace_equation

    In physics, the Young–Laplace equation (/ l ə ˈ p l ɑː s /) is an algebraic equation that describes the capillary pressure difference sustained across the interface between two static fluids, such as water and air, due to the phenomenon of surface tension or wall tension, although use of the latter is only applicable if assuming that the wall is very thin.

  4. Laplace pressure - Wikipedia

    en.wikipedia.org/wiki/Laplace_pressure

    The Laplace pressure is the pressure difference between the inside and the outside of a curved surface that forms the boundary between two fluid regions. [1] The pressure difference is caused by the surface tension of the interface between liquid and gas, or between two immiscible liquids.

  5. Dewetting - Wikipedia

    en.wikipedia.org/wiki/Dewetting

    The surface of the liquid has the shape of a spherical cap, due to Laplace pressure S = γ SG − γ SL − γ LG {\displaystyle S\ =\gamma _{\text{SG}}-\gamma _{\text{SL}}-\gamma _{\text{LG}}} where γ SG is the solid-gas surface tension , γ SL is the solid-liquid surface tension and γ LG is the liquid-gas surface tension (measured for the ...

  6. Hydrostatics - Wikipedia

    en.wikipedia.org/wiki/Hydrostatics

    Due to the fundamental nature of fluids, a fluid cannot remain at rest under the presence of a shear stress. However, fluids can exert pressure normal to any contacting surface. If a point in the fluid is thought of as an infinitesimally small cube, then it follows from the principles of equilibrium that the pressure on every side of this unit ...

  7. Jurin's law - Wikipedia

    en.wikipedia.org/wiki/Jurin's_Law

    At the meniscus interface, due to the surface tension, there is a pressure difference of =, where is the pressure on the convex side; and is known as Laplace pressure. If the tube has a circular section of radius r 0 {\displaystyle r_{0}} , and the meniscus has a spherical shape, the radius of curvature is r = r 0 / cos ⁡ θ {\displaystyle r ...

  8. Capillary length - Wikipedia

    en.wikipedia.org/wiki/Capillary_length

    However, a fluid also experiences pressure that is induced by surface tension, commonly referred to as the Young–Laplace pressure. [1] Surface tension originates from cohesive forces between molecules, and in the bulk of the fluid, molecules experience attractive forces from all directions. The surface of a fluid is curved because exposed ...

  9. Pressure - Wikipedia

    en.wikipedia.org/wiki/Pressure

    Surface pressure is denoted by π: = and shares many similar properties with three-dimensional pressure. Properties of surface chemicals can be investigated by measuring pressure/area isotherms, as the two-dimensional analog of Boyle's law, πA = k, at constant temperature. Surface tension is another example of surface pressure, but with a ...