Effect of viscous force on dynamic contact angle measurement using Wilhelmy plate method
| Autor: | Alireza Mohammad Karim, H. Pirouz Kavehpour |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Force balance equation
Materials science 02 engineering and technology Mechanics Viscous liquid 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Capillary number 0104 chemical sciences Dynamic contact Physics::Fluid Dynamics Shear rate Colloid and Surface Chemistry Significant error 0210 nano-technology Wilhelmy plate |
| Zdroj: | Colloids and Surfaces A: Physicochemical and Engineering Aspects. 548:54-60 |
| ISSN: | 0927-7757 |
| Popis: | Wilhelmy plate method does not consider viscous force in the force balance equation to measure the dynamic contact angle and this results in a significant error in the measurement. Differences between the results obtained by optical method and Wilhelmy plate method indicate the importance of viscous force in the force balance equation. A theoretical viscous model is proposed, which must be considered in the force balance equation in Wilhelmy plate method to increase the accuracy of the dynamic contact angle measurement, especially for the case of highly viscous liquids and for experiments at large speeds of the plate, which can lead to large shear rate along the surface of the plate. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect