Contact Line Dynamics in the Late-Stage Coalescence of Diethylene Glycol Drops
| Autor: | Daniel Beysens, R. D. Narhe |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Arrhenius equation
Materials science Chromatography Silicon Drop (liquid) Composite number Relaxation (NMR) Diethylene glycol chemistry.chemical_element Thermodynamics Viscous liquid Dissipation Surfaces Coatings and Films symbols.namesake chemistry.chemical_compound chemistry Materials Chemistry symbols Physical and Theoretical Chemistry |
| Zdroj: | The Journal of Physical Chemistry B. 110:22133-22135 |
| ISSN: | 1520-5207 1520-6106 |
| DOI: | 10.1021/jp0565655 |
| Popis: | We investigated the contact line dynamics of a composite drop formed as a result of the coalescence during the condensation of two diethylene glycol (DEG) drops at -4 degrees C on a silicon surface. The composite drop relaxes exponentially toward equilibrium with a typical relaxation time, tc, which depends on the equilibrium radius, R, of the composite drop. The value of tc is found to be in the range of 10-100 s for R approximately 1-4 microm. The relaxation dynamics is found to be larger by 6 orders of magnitude than that predicted by bulk hydrodynamics because of high dissipation in the contact line vicinity. Similar to low viscous liquids (water), this high dissipation can be attributed to an Arrhenius factor resulting from the phase change in the contact line vicinity and to the influence of surface defects that pin the contact line. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|