Apparent slip due to the motion of suspended particles in flows of electrolyte solutions

Langmuir : the ACS Journal of Surfaces and Colloids
Eric Lauga

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 the particles would lead to the wrong conclusion that the no-slip boundary condition is violated. We evaluate the apparent slip length, compare it with experiments, and discuss the implications of these results.

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Citations

Feb 22, 2017·Advanced Materials·Wonsuk JungChang-Soo Han
May 21, 2005·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Pierre Joseph, Patrick Tabeling
Oct 16, 2013·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Uddipta Ghosh, Suman Chakraborty
Jun 29, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Edouard Brunet, Armand Ajdari
Jan 8, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Shannon L EichmannMichael A Bevan

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