Uncertainty in contact angle measurements from the tangent method |
| |
Authors: | C. W. Extrand |
| |
Affiliation: | CPC, Inc., St. Paul, MN, USA |
| |
Abstract: | The uncertainty in contact angles from sessile drops measured by the tangent method was estimated using a standard error propagation technique involving partial derivatives. If contact angles are <60°, then uncertainty of the tangent method appears to be quite small,≤ ± 2°. However, as θ values approach 90°, uncertainty increases asymptotically and can exceed ±5°. |
| |
Keywords: | Contact angles tangent method uncertainty error propagation |
|
|