Choi, WooSeok ; Sharma, Ashtosh ; Qian, Shizhi ; Lim, Geunbae ; Joo, Sang Woo (2010) Is free surface free in micro-scale electrokinetic flows? Journal of Colloid and Interface Science, 347 (1). pp. 153-155. ISSN 0021-9797
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.jcis.2010.03.049
Abstract
When a rigid boundary is replaced by a free surface, or by a liquid-liquid interface, the shear stress is reduced near the boundary because the no-slip on the rigid boundary is relaxed. A nonzero fluid velocity exists on the free surface, and the flow rate would increase by the replacement. For electrokinetic flows, however, the replacement from rigid to free boundary can lead to an increase (decrease) in shear stress (flow rate). This counterintuitive effect of free surface is presented in this note for a generic electroosmotic flow in a microchannel.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Electroosmosis; Free Surface; Electrokinetics; Microfluidics; Interfacial Flows |
| ID Code: | 47014 |
| Deposited On: | 06 Jul 2011 11:11 |
| Last Modified: | 06 Jul 2011 11:11 |
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