Experimental study of the electrokinetic behaviour of kaolinite–smectite mixtures

Soil Research ◽  
2017 ◽  
Vol 55 (8) ◽  
pp. 743
Author(s):  
M. Ben Salah ◽  
H. Souli ◽  
P. Dubujet ◽  
M. Hattab ◽  
M. Trabelsi Ayadi
Keyword(s):  
Electrical Conductivity ◽  
Experimental Study ◽  
Coordinate System ◽  
Mechanical Stress ◽  
Void Ratio ◽  
Hydraulic Permeability ◽  
Compression Index ◽  
Osmotic Flow ◽  
Osmotic Permeability ◽  
Electro Osmotic Flow

The evolution of the behaviour of kaolinite–smectite mixtures was studied using mechanical and electrokinetic tests. Oedometric tests showed that the compression index of the mixtures increases with increasing smectite percentage and that the curves feature a double slope in the [log σv,e] (where σv is the vertical mechanical stress and e is the void ratio) coordinate system when the percentage of smectite is strictly higher than 25%. Electrokinetic tests show that, of smectite the electrical conductivity and electro-osmotic flow tend towards that of the smectite. Measurements performed after the electrokinetic tests showed that the pH and conductivity are constant when the amount of smectite is lower than 25%. For higher smectite content, acidification of the medium is not totally obtained and the electrical conductivity is higher near the anode because of the slow diffusion of H+ ions in the structure. The tests also highlight that the electro-osmotic permeability is affected by the hydraulic permeability, although the variation in electro-osmotic permeability remains small compared with that of hydraulic permeability.

An experimental study on an electro-osmotic flow-based silicon heat spreader

2010 ◽  
Vol 9 (4-5) ◽  
pp. 787-795 ◽  
Author(s):  
P. F. Eng ◽  
P. Nithiarasu ◽  
O. J. Guy
Keyword(s):  
Experimental Study ◽  
Heat Spreader ◽  
Osmotic Flow ◽  
Electro Osmotic Flow

Experimental study on the impact factors of electro-osmotic flow in dehumidification applications

2019 ◽  
Vol 202 ◽  
pp. 109388 ◽  
Author(s):  
Shanshan Cai ◽  
Wanyin Huang ◽  
Xu Luo ◽  
Xu Li ◽  
Jiajun Ji
Keyword(s):  
Experimental Study ◽  
Impact Factors ◽  
Osmotic Flow ◽  
The Impact ◽  
Electro Osmotic Flow

An experimental study of electro-osmotic flow in rectangular microchannels

2004 ◽  
Vol 506 ◽  
pp. 357-367 ◽  
Author(s):  
R. SADR ◽  
M. YODA ◽  
Z. ZHENG ◽  
A. T. CONLISK
Keyword(s):  
Experimental Study ◽  
Rectangular Microchannels ◽  
Osmotic Flow ◽  
Electro Osmotic Flow

scholarly journals Towards bio-inspired artificial muscle: a mechanism based on electro-osmotic flow simulated using dissipative particle dynamics

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ramin Zakeri
Keyword(s):  
Zeta Potential ◽  
Electric Field ◽  
Dissipative Particle Dynamics ◽  
Artificial Muscle ◽  
Particle Dynamics ◽  
Polymer Membrane ◽  
Channel Width ◽  
Micro Channel ◽  
Osmotic Flow ◽  
Electro Osmotic Flow

AbstractOne of the unresolved issues in physiology is how exactly myosin moves in a filament as the smallest responsible organ for contracting of a natural muscle. In this research, inspired by nature, a model is presented consisting of DPD (dissipative particle dynamics) particles driven by electro-osmotic flow (EOF) in micro channel that a thin movable impermeable polymer membrane has been attached across channel width, thus momentum of fluid can directly transfer to myosin stem. At the first, by validation of electro-osmotic flow in micro channel in different conditions with accuracy of less than 10 percentage error compared to analytical results, the DPD results have been developed to displacement of an impermeable polymer membrane in EOF. It has been shown that by the presence of electric field of 250 V/m and Zeta potential − 25 mV and the dimensionless ratio of the channel width to the thickness of the electric double layer or kH = 8, about 15% displacement in 8 s time will be obtained compared to channel width. The influential parameters on the displacement of the polymer membrane from DPD particles in EOF such as changes in electric field, ion concentration, zeta potential effect, polymer material and the amount of membrane elasticity have been investigated which in each cases, the radius of gyration and auto correlation velocity of different polymer membrane cases have been compared together. This simulation method in addition of probably helping understand natural myosin displacement mechanism, can be extended to design the contraction of an artificial muscle tissue close to nature.

Higher Ion Selectivity with Lower Energy Usage Promoted by Electro-osmotic Flow in the Transport through Conical Nanopores

2021 ◽  
Vol 125 (6) ◽  
pp. 3269-3276
Author(s):  
Warren Brown ◽  
Maksim Kvetny ◽  
Ruoyu Yang ◽  
Gangli Wang
Keyword(s):  
Lower Energy ◽  
Ion Selectivity ◽  
Energy Usage ◽  
Osmotic Flow ◽  
Conical Nanopores ◽  
Electro Osmotic Flow

Modeling electro-osmotic flow and thermal transport of Caputo fractional Burgers fluid through a micro-channel

2021 ◽  
pp. 095440892110259
Author(s):  
Mohammed Abdulhameed ◽  
Garba Tahiru Adamu ◽  
Gulibur Yakubu Dauda
Keyword(s):  
Electric Field ◽  
Laplace Transform ◽  
Inverse Laplace Transform ◽  
Micro Channel ◽  
Osmotic Flow ◽  
Sine Transform ◽  
Fourier Sine ◽  
Fourier Sine Transform ◽  
Burgers Fluid ◽  
Electro Osmotic Flow

In this paper, we construct transient electro-osmotic flow of Burgers’ fluid with Caputo fractional derivative in a micro-channel, where the Poisson–Boltzmann equation described the potential electric field applied along the length of the microchannel. The analytical solution for the component of the velocity profile was obtained, first by applying the Laplace transform combined with the classical method of partial differential equations and, second by applying Laplace transform combined with the finite Fourier sine transform. The exact solution for the component of the temperature was obtained by applying Laplace transform and finite Fourier sine transform. Further, due to the complexity of the derived models of the governing equations for both velocity and temperature, the inverse Laplace transform was obtained with the aid of numerical inversion formula based on Stehfest's algorithms with the help of MATHCAD software. The graphical representations showing the effects of the time, retardation time, electro-kinetic width, and fractional parameters on the velocity of the fluid flow and the effects of time and fractional parameters on the temperature distribution in the micro-channel were presented and analyzed. The results show that the applied electric field, electro-osmotic force, electro-kinetic width, and relaxation time play a vital role on the velocity distribution in the micro-channel. The fractional parameters can be used to regulate both the velocity and temperature in the micro-channel. The study could be used in the design of various biomedical lab-on-chip devices, which could be useful for biomedical diagnosis and analysis.

scholarly journals Experimental Study on Improvement of Marine Soft Soil with Alkali Residue

2018 ◽  
Vol 53 ◽  
pp. 04021
Author(s):  
SHAO Yong ◽  
LIU Xiao-li ◽  
ZHU Jin-jun
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Void Ratio ◽  
Soft Soil ◽  
Compressive Modulus ◽  
Engineering Properties ◽  
Test Results ◽  
Use Of Resources ◽  
One Year

Industrial alkali slag is the discharge waste in the process of alkali production. About one million tons of alkali slag is discharged in China in one year. It is a burden on the environment, whether it is directly stacked or discharged into the sea. If we can realize the use of resources, it is a multi-pronged move, so alkali slag is used to improve solidified marine soft soil in this paper. The test results show that the alkali residue can effectively improve the engineering properties of marine soft soil. Among them, the unconfined compressive strength and compressive modulus are increased by about 10 times, and the void ratio and plasticity index can all reach the level of general clay. It shows that alkali slag has the potential to improve marine soft soil and can be popularized in engineering.

Electro-osmotic flow in nanochannels with voltage-controlled polyelectrolyte brushes: Dependence on grafting density and normal electric field

2012 ◽  
Vol 50 (11) ◽  
pp. 805-811 ◽  
Author(s):  
Qianqian Cao ◽  
Chuncheng Zuo ◽  
Lujuan Li ◽  
Yinhe Zhang ◽  
Guang Yan
Keyword(s):  
Electric Field ◽  
Polyelectrolyte Brushes ◽  
Osmotic Flow ◽  
Grafting Density ◽  
Normal Electric Field ◽  
Electro Osmotic Flow

scholarly journals Mixing enhancement in microfluidic channel with a constriction under periodic electro-osmotic flow

2010 ◽  
Vol 4 (1) ◽  
pp. 014101 ◽  
Author(s):  
Chun Yee Lim ◽  
Yee Cheong Lam ◽  
Chun Yang
Keyword(s):  
Microfluidic Channel ◽  
Mixing Enhancement ◽  
Osmotic Flow ◽  
Electro Osmotic Flow

Theoretical and experimental study of the electroacoustic behavior of lithium niobate under an initial mechanical stress

2013 ◽  
Vol 60 (10) ◽  
pp. 2219-2224 ◽  
Author(s):  
Mathieu Domenjoud ◽  
Mickael Lematre ◽  
Michel Gratton ◽  
Marc Lethiecq ◽  
Louis-Pascal Tran-Huu-Hue
Keyword(s):  
Experimental Study ◽  
Lithium Niobate ◽  
Mechanical Stress
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