Academic Journal
Evidence of slippage breakdown for a superhydrophobic microchannel
| العنوان: | Evidence of slippage breakdown for a superhydrophobic microchannel |
|---|---|
| المؤلفون: | Guido Bolognesi, C. Cottin-Bizonne, C. Pirat |
| سنة النشر: | 2014 |
| المجموعة: | Loughborough University: Figshare |
| مصطلحات موضوعية: | Chemical Engineering not elsewhere classified, untagged |
| الوصف: | © 2014 AIP Publishing LLC.A full characterization of the water flow past a silicon superhydrophobic surface with longitudinal micro-grooves enclosed in a microfluidic device is presented. Fluorescence microscopy images of the flow seeded with fluorescent passive tracers were digitally processed to measure both the velocity field and the position and shape of the liquid-air interfaces at the superhydrophobic surface. The simultaneous access to the meniscus and velocity profiles allows us to put under a strict test the no-shear boundary condition at the liquid-air interface. Surprisingly, our measurements show that air pockets in the surface cavities can sustain non-zero interfacial shear stresses, thereby hampering the friction reduction capabilities of the surface. The effects of the meniscus position and shape as well as of the liquid-air interfacial friction on the surface performances are separately assessed and quantified. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| Relation: | 2134/25502; https://figshare.com/articles/journal_contribution/Evidence_of_slippage_breakdown_for_a_superhydrophobic_microchannel/9244586 |
| الاتاحة: | https://figshare.com/articles/journal_contribution/Evidence_of_slippage_breakdown_for_a_superhydrophobic_microchannel/9244586 |
| Rights: | CC BY-NC-ND 4.0 |
| رقم الانضمام: | edsbas.DF758A2A |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |