| |
|
|
|
| |
|
Name |
Capilarity |
| |
 |
| |
|
Equation |
H
=
2
γ
cos
θ
ρga
|
| |
|
| |
|
Definition of terms |
H = height of fluid in tube, γ = surface tension, θ = angle between edge of fluid meniscus and side of tube, g = acceleration due to gravity, a = radius of tube |
| |
|
| |
|
Comments |
In a thin vertical tube part filled with fluid, the surface tension in the top causes a jump in the pressure across the interface, which allows a column of liquid to be supported against gravity. The height H of this column is given by the above equation. |
| |
|
| |
|
References
|
An Introduction to Fluid Mechanics , G K Batchelor, CUP, 1967 |
| |
|
|
|
|
