When a dilute colloidal suspension of 50-Β΅m polyamide particles is exposed to a deformable interface, spontaneous flow occurs. This flow is orderly, reproducible, and shows a proportional dependence on particle concentration. The same type of flow was also observed in a silicon oil suspension. Placi
Instability of a Meniscus Due to Surface Tension Gradient-Driven Flow
β Scribed by Alain de Ryck
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 194 KB
- Volume
- 209
- Category
- Article
- ISSN
- 0021-9797
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β¦ Synopsis
The instability of a meniscus due to a Marangoni flow is investigated in the case of a mixture of two liquids of different volatility and surface tension. We propose a theoretical description of this behavior which predicts the wavelength of the instability, in agreement with the experiments of Vuilleumier et al. performed with ethanol-water mixtures and for isooctane-decane solutions. Copyright 1999 Academic Press.
π SIMILAR VOLUMES
A model for Marangoni flows that we observed on plane free surfaces of thin layers of aqueous fatty alcohol solutions is developed by considering evaporation-condensation of alcohol. The velocities of surface-tension-driven flows caused by gradients in temperature and in concentration are evaluated