Sponsored Links
Surface tension is the energy required to stretch a unit change of a surface area. Surface tension will form a drop of liquid to a sphere since the sphere offers the smallest area for a definite volume.
Surface tension can be defined as
σ = Fs / l (1)
where
σ = surface tension (N/m)
Fs = stretching force (N)
l = unit length (m)
Alternatively, surface tension is typically measured in dynes/cm, which is
or as surface energy J/m2 or alternatively ergs per square centimeter.
Common Imperial units used are lb/ft and lb/in.
Water surface tension at different temperatures can be taken from the table below:
| Temperature (oC) |
Surface Tension - σ - (N/m) |
| 0 | 0.0757 |
| 10 | 0.0742 |
| 20 | 0.0728 |
| 30 | 0.0712 |
| 40 | 0.0696 |
| 50 | 0.0679 |
| 60 | 0.0662 |
| 70 | 0.0644 |
| 80 | 0.0626 |
| 90 | 0.0608 |
| 100 | 0.0588 |
Sponsored Links
Sponsored Links
Free SketchUp Engineering ToolBox - enabled for use with the amazing, fun and free Google SketchUp.
© The Engineering ToolBox 2005
8 6 27