Electroosmosis


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electroosmosis

[i‚lek·trō·äs′mō·səs]
(physical chemistry)
The movement in an electric field of liquid with respect to colloidal particles immobilized in a porous diaphragm or a single capillary tube.

Electroosmosis

 

(also electroendosmosis), the movement of a liquid through capillaries or porous diaphragms upon application of an external electric field. It is one of the principal electrokinetic phenomena. Electroosmosis is used to remove excess moisture from the soil in soil compaction for road building and the construction of hydraulic engineering installations, to dry peat, and to purify water and liquids used in industry.

References in periodicals archive ?
Particle manipulation and fluid flow control using AC electro-osmosis have been reported in various forms, such as biased AC electroosmosis [11, 12], and 3D AC electro-osmosis pump [13, 14], travelling wave AC electro-osmosis pump [15], asymmetric electrode AC electro-osmosis pump [16] and particle traps [17-20].
The resulting flow from AC electroosmosis and ETF observed by Wang et al.
Seventeen chapters cover basic concepts, governing equations, basic flow solutions, hydraulic resistance and compliance, diffusion, time-dependent flow, capillary effects, electrohydrodynamics, electroosmosis, dielectrophoresis, magnetophoresis, thermal transfer, two-phase flow, complex flow patterns, acoustofluidics, optofluidics, and nanofluidics.
Design-modeling tools are needed that rapidly simulate the complex underlying phenomena such as electroosmosis, electrophoresis, sample dispersion, mixing, and biochemical reactions without significantly compromising accuracy (1-5).
There are also electro thermal forces, in which the current creates non-uniform heating in the fluid, leading to coulomb and dielectric forces; and electroosmosis, in which ion flow creates tiny forces in the fluid.
High-resolution separations based on electrophoresis and electroosmosis.
Electroosmosis is electric-field-induced fluid movement resulting from the surface charge on the microchannel walls.
In situ experiments on low permeability soils provide evidence that pump-and-treat flow rates can be increased using electroosmosis in conjunction with emplacement of granular graphite within hydraulic fractures (Murdoch and Chen 1997).
Navy during the war, later met a number of German engineers who told him that this use of electroosmosis was fairly common.
The magnitude of mass transport by electroosmosis is often at least one order of magnitude less than that induced by electrical migration.
Electrokinetic phenomena such as electrophoresis and electroosmosis have been widely studied in microchannels.
A significant limitation of electrophoretic mobility and streaming potential measurements, both classified under electroosmosis techniques, is that only an average value of the zeta potential/streaming potential is detected--regardless of whether the surface charge distribution is homogeneous or otherwise.