Generation of droplets with adjustable chemical concentrations based on fixed potential induced-charge electro-osmosis

The effective control of the sample concentration within droplets is essential in a broad range of assays in chemistry and biochemistry. Here we provide an electric method for producing batches...

Numerical Simulation of Pore Water Distribution Under Electric Field in Unsaturated Soils

A numerical model predicting the moisture distribution under external electric field in unsaturated soils is established. Key parameters including matric potential, hydraulic and electrical permeability coefficient and electric conductivity are discussed. The simulation results are in good agreement with the measured data from literaturea, which verify exactness and suitability of the model. In general, the moisture contents decrease with time under the action of external electric force and matrix suction. A slight increase in moisture contert was observed in the anodic area at the beginning of the treatment. The electro-osmosis treatment effect can be enhanced by improving the voltage gradient or weaken the voltage loss at electrode. The limit value of electroosmosis treatment in moisture content is observed and the method can only be applied on the soil with moisture content higher than the limit value.

Electro-osmosis modulated biologically inspired flow of solid liquid suspension in a channel with complex progressive wave: An application of targeted drugging

Electrokinetic microperistaltic pumps are important biomechanical devices, helps in targeted drugging of sick body parts. The current article is written to focus on mathematical modelling and analysis of some important aspect of such flows in a channel with complex wave. It is considered that solid partilcle are uniformly distributed in the flow and these particle are non-conducting. Parameters such as Particle volume fraction coefficient, Electro-osmotic parameter and Helmholtz-Smoluchowski parameter are specially been focused in this study. Spherical shaped equally sized are uniformly floated in a non-Newtonian Powell-Eyring base fluid. The defined flow problem is modelled and analyzed analytically for the transport of solid liquid suspension. It is accepted that the flow is steady, nonturbulent and propagating waves do have a considerably longer wave-length when compared to amplitude. The conditions and assumptions lead to a model of coupled partial differential equations of order two. The exact results by HPM expansion method are procured and shown accordingly. The predictions about the behaviour of important appearing parameters are displayed using figures. The impact of sundry parameters are analyzed. The application of current study involved transporting/ targeted drug delivery system using Peristaltic micropumps and magnetic field in pharmacological engineering of biofluids like blood.

A Study on Nano-Flow Control of Bio-Inspired Nanosized Ion Channel

This study presents the possibility of control of nanofluidics in the bio-inspired nanosized ion channel using a field effect transistor (FET) structure. We analyzed effects from main dominant factors to control the ion flow in nanosized channel such as electro-osmosis, diffusion effect, Coulomb force between ions and pressure force. Additionally, we suggest a strategy to control the ion flow accurately at the specific position in the nanochannel by handling the viscosity, ion molecular density, pressure, gate and trans-cis voltages of FET structure.

Heat Transport Phenomena for the Darcy–Forchheimer Flow of Casson Fluid over Stretching Sheets with Electro-Osmosis Forces and Newtonian Heating

In this study, an investigation has been carried out to analyze the impact of electro-osmotic effects on the Darcy–Forchheimer flow of Casson nanofluid past a stretching sheet. The energy equation was modelled with the inclusion of electro-osmotic effects with viscous and Joule dissipations. The governing system of partial differential equations were transformed by using the suitable similarity transformations to a system of ordinary differential equations and then numerically solved by using the Runge–Kutta–Fehlberg method with a shooting scheme. The effects of various parameters of interest on dimensionless velocity and temperature distributions, as well as skin friction and heat transfer coefficient, have been adequately delineated via graphs and tables. A comparison with previous published results was performed, and good agreement was found. The results suggested that the electric and Forchheimer parameters have the tendency to enhance the fluid velocity as well as momentum boundary layer thickness. Enhancements in temperature distribution were observed for growing values of Eckert number. It was also observed that higher values of electric field parameter diminished the wall shear stress and local Nusselt number.