:Talk:Electro-osmosis

Reading what others write about it, I have the impression that this is a lousy description.

:A. Terrence Conlisk, in Electrophoresis, Vol. 26, p. 1896–1912 (2005) [DOI: 10.1002/elps.200410238]:

::"... electroosmosis, which is defined as the motion of fluid past a solid surface due to an externally defined electric field"

:S. Yao und G. Santiago, Journal of Colloid and Interface Science, Vol. 268, pp. 133-142 (2003) [DOI: 10.1016/S0021-9797(03)00731-8]:

::"The term electroosmosis refers to the bulk motion of an electrolyte caused by Coulombic forces acting on diffuse ions near a flow channel's solid/liquid interface."

To me this means a flow parallel to a solid surface. Hence, at least the flow through a thin membrane is not what one considers a primary example of electroosmosis. For thicker porous media or membranes with long channels, electroosmosis along the grains or channel walls will occur. Also, I see no reference to the electrical double layer, which seems to play an important role. Can an expert in the field please write a few words about this? --Anastasius zwerg 18:34, 6 December 2006 (UTC)

but for the wrong reasons

eeo is caused by, in language appropriate for a general encyclopedia, the following

in the presence of water, eeo develops when a fixed surface has an electrical charge

because we live in an oxygen rich atmosphere, most surfaces have a neg charge

in water, the neg charge on the surface is compensated for by a pos charge in solution (you havve to an equal number of + and _ charges, otherwise a strong force develops)

when you apply a voltage across the solution, + and - ions move, and each carrys some water; the net trnasport of water is zero

however, the fixed surface charge can't move - but the + charge in solution cna

the + charge moves with its water, this results in net flow of water

note that this requires a fixed charge

note that the current article is NOT written at an appropriate level - it doesn't say how eeo varys with salt conc in the bulk fluid, the current, etc in SIMPLE language

note that since this is movement of water near fixed charges, if you have a pipe, the water moves only near the wall, as in the fluid in the pipe there are no fixed charges

the water layer that moves, under practical conditions, is thin - a micron or less

hence in a 1/2 inch diameter pipe (~12 cm) you dont notice net flow of water

in a capillary with 50micron ID, the bulk flow can be quite noticealbe

geez, cant any of you people who write these science articles bother to loweryourselves to the level appropraiate for a general encylopedia ???????

• by defintion* calculus is NOT appropriate, and if you diagree you are a schmuck — Preceding unsigned comment added by 50.245.17.106 (talk) 20:15, 17 June 2016 (UTC)

The NEC has a reference to this phenominon in articel 310.2(II) as an informational note. If anyone can clarify the effect it would be helpful to people "googling" it. Thank you in advance for your work. Cheers!

24.167.199.4 (talk) 13:32, 22 January 2011 (UTC)

The NEC's reference is important because this action can greatly affect the integrity of insulation on conductors. 24.123.130.30 (talk) 18:17, 21 September 2011 (UTC)