Results 151 to 160 of about 2,748 (198)

Electro-Osmosis in Soils

Géotechnique, 1949
Summary The present paper shows that, from a practical point of view, the electro-osmotic transport of water may be assumed to be constant for all soils. The magnitude of the osmotic permeability was found to be ke=5 × 10−5 cm. per sec. for for 1 volt per cm.
openaire   +1 more source

Electro-osmosis in a frozen soil

Cold Regions Science and Technology, 1991
Abstract An experimental program that measured the electro-osmotic conductivity variation with temperature in a frozen soil showed that the conductivity remained constant at the value measured at 22°C until about 0.4°C below the freezing point depression. Below this temperature the electro-osmotic conductivity decreases rapidly.
Wim van Gassen, D.C. Sego
openaire   +1 more source

Electro-osmosis in Frozen Soil

Nature, 1964
WATER can be transported in unfrozen soil under an electrical gradient. This process, which is called electro-osmosis, is due to an excess of positive ions over negative ions in the water near a solid surface. The amount of water which can be transported by electro-osmosis is such that in some instances it has been used to stabilize soft clay ...
P. HOEKSTRA, E. CHAMBERLAIN
openaire   +1 more source

Electro-Osmosis on Inhomogeneously Charged Surfaces

Physical Review Letters, 1995
The electro-osmotic flow generated by an electric field ${\stackrel{\ensuremath{\rightarrow}}{E}}_{\mathrm{ext}}$ in a fluid bounded by surfaces bearing a charge varying in space is considered. Focusing on a slab geometry, I characterize the formation of steady convective rolls and describe their morphology as a function of the slab thickness.
openaire   +2 more sources

Electrothermal ac electro-osmosis

Applied Physics Letters, 2009
Two ac polarization mechanisms, charge accumulation due to electrode double layer charging and bulk permittivity/conductivity gradients generated by Joule heating, are combined in the double layer by introducing zwitterions to produce a new ac electrokinetic pump with the largest velocity (>1 mm/s) and flow penetration depth (100 μm) reported ...
Zachary R. Gagnon, Hsueh-Chia Chang
openaire   +1 more source

Drying characteristics of electro-osmosis dewatered sludge

Environmental Technology, 2016
Electro-osmotic dewatering (EDW) is one of the effective deeply dewatering technologies that is suitable for treating sludge with 55-80% of moisture content. Regarding EDW as the pre-treatment process of drying or incinerating, this article investigated the drying characteristics of electro-osmosis-dewatered sludge, including shear stress test, drying ...
Degang, Ma, Jingjing, Qian, Hongmin, Zhu, Jun, Zhai   +3 more
openaire   +2 more sources

Universal electro-osmosis formulae for porous media

Journal of Colloid and Interface Science, 2008
Approximate analytical formulae valid for any porous media with elongated pores are derived for the electro-osmotic coefficient alpha and for the average ionic concentration n . A macroscopic Debye-Hückel length kappa (-)(-1) based on n is introduced. Simultaneously, the electro-osmotic coefficient alpha is systematically calculated for various media ...
A, Gupta, D, Coelho, P M, Adler
openaire   +2 more sources

Electro-Osmosis in Squid Axons

Journal of the Marine Biological Association of the United Kingdom, 1970
When electro-osmosis is observed through a substance (or tissue) certain inferences can be made about the fine structure of the substance. These include the presence of a zeta potential whose sign is the same as that of the electrode towards which water moves, and the presence of interstices or channels large enough to allow ions to move through them ...
openaire   +1 more source

Electro-osmosis

Journal of Chromatography A, 1974
Victor Pretorius, B.J. Hopkins, J.D. Schieke   +2 more
openaire   +1 more source

Streaming Potential and Electro-osmosis: Mechanism of Electro-osmosis

Nature, 1952
K. L. NASH, N. W. LISTER
openaire   +1 more source