Capillary pressure in a tube
Description
In a sufficiently narrow tube of circular cross-section of radius “a”, the interface between two fluids forms a meniscus that is a portion of the surface of a sphere with radius R. The pressure jump across this surface is related to the surface tension and the radius of the portion of the sphere.
Related formulasVariables
Δp | Capillary pressure (Pa) |
γ | Surface tension (N/m) |
R | Radius of the meniscus (m) |