Condensed Matter

    

Plug-Flow Does not Exist in Electro-Osmosis

Authors: Rajib Chakraborty

I eliminate hundred years old notion of `plug-flow' in electro-osmosis, which was predicted by incomplete `electric double layer' (EDL) theory. A recently developed `electric triple layer' (ETL) theory removes some serious shortcomings of EDL theory regarding conservation of electric charge, and when applied to electro-osmosis, shows that the velocity profile is not `plug-like' at all, but more like a parabola; it agrees with experiments and molecular dynamical simulation (MDS) results. Also, I redefine ‘Helmholtz-Smoluchowski velocity-scale’, which clears certain misunderstandings regarding representation of flow direction, and accommodates solution and geometrical properties within it. I describe some novel electro-osmotic flow controlling mechanisms. The entire electrokinetic theory must be modified using these concepts.

Comments: 11 Pages.

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Submission history

[v1] 2014-06-05 13:50:53

Unique-IP document downloads: 289 times

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