dorsal/arxiv
View SchemaApparent slip due to the motion of suspended particles in flows of electrolyte solutions
| Authors | Eric Lauga |
|---|---|
| Categories | |
| ArXiv ID | physics/0403022 |
| URL | https://arxiv.org/abs/physics/0403022 |
| DOI | 10.1021/la049464r |
| Journal | Langmuir (2004) 20, 8924-8930 |
Abstract
We consider pressure-driven flows of electrolyte solutions in small channels or capillaries in which tracer particles are used to probe velocity profiles. Under the assumption that the double layer is thin compared to the channel dimensions, we show that the flow-induced streaming electric field can create an apparent slip velocity for the motion of the particles, even if the flow velocity still satisfies the no-slip boundary condition. In this case, tracking of particle would lead to the wrong conclusion that the no-slip boundary condition is violated. We evaluate the apparent slip length, compare with experiments, and discuss the implications of these results.
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"abstract": "We consider pressure-driven flows of electrolyte solutions in small channels\nor capillaries in which tracer particles are used to probe velocity profiles.\nUnder the assumption that the double layer is thin compared to the channel\ndimensions, we show that the flow-induced streaming electric field can create\nan apparent slip velocity for the motion of the particles, even if the flow\nvelocity still satisfies the no-slip boundary condition. In this case, tracking\nof particle would lead to the wrong conclusion that the no-slip boundary\ncondition is violated. We evaluate the apparent slip length, compare with\nexperiments, and discuss the implications of these results.",
"arxiv_id": "physics/0403022",
"authors": [
"Eric Lauga"
],
"categories": [
"physics.flu-dyn",
"cond-mat.soft",
"physics.gen-ph"
],
"doi": "10.1021/la049464r",
"journal_ref": "Langmuir (2004) 20, 8924-8930",
"title": "Apparent slip due to the motion of suspended particles in flows of electrolyte solutions",
"url": "https://arxiv.org/abs/physics/0403022"
},
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