Electro- and Magneto-hydrodynamic Manipulation of Particles Suspended in Fluids

A special issue of Fluids (ISSN 2311-5521).

Deadline for manuscript submissions: closed (1 December 2019) | Viewed by 2474

Special Issue Editors


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Guest Editor
Department of Mechanical Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA
Interests: fluid dynamics; viscoelastic fluids; multiphase and particulate flows; biological fluid mechanics; microfluidics; electrohydrodynamics

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Guest Editor
Department of Mechanical Engineering, Temple University, Philadelphia, PA 19122, USA
Interests: mathematical fluid mechanics; computational methods; rheology; multiphase flows

Special Issue Information

Dear Colleagues,

The focus of this Special Issue is on the techniques that employ an externally applied electric or magnetic field to electro- and magneto-hydrodynamically manipulate particles, droplets, biological cells and tissues, macromolecules, etc., suspended in liquids. The goal can be to position, move, or collect particles at a certain location within the device, separate two or more types of particles, or remove particles from the suspending liquid. The electric field can be spatially uniform or nonuniform (mutual dielectrophoresis) and time-dependent. In a nonuniform electric field, positively polarized particles collect at the local maxima of the electric field, and negatively polarized particles at the local minima. In a uniform electric field, the particles rearrange relative to each other because of their polarization and interaction with each other. In recent years, novel microfluidic devices have been developed for trapping and separating nano-to-micron-sized particles in liquids, including biological cells and macromolecules. This Special Issue will also focus on the experimental and theoretical techniques aimed at modeling the various factors, e.g., fluid dynamic forces, dielectric mismatch, frequency of electric field, etc., that collectively determine the effectiveness of these techniques.

We welcome theoretical, numerical, and experimental contributions.

Dr. Pushpendra Singh
Dr. Shriram Pillapakkam
Guest Editors

Manuscript Submission Information

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Keywords

  • electrorhological fluids
  • magnetorheological fluids
  • dielectrophoresis
  • traveling-wave dielectrophoresis
  • particle trapping, filtration, or separation
  • electrically induced structures at micro/nano scales
  • enrichment of colloidal particles
  • dielectrophoresis-based cell characterization or separation
  • dielectrophoresis-based particle translocation in microfluidic devices

Published Papers (1 paper)

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Research

16 pages, 915 KiB  
Article
Ionic Fracture Fluid Leak-Off
by Vladimir Shelukhin and Mikhail Epov
Fluids 2019, 4(1), 32; https://doi.org/10.3390/fluids4010032 - 19 Feb 2019
Viewed by 2204
Abstract
The study is motivated by monitoring the space orientation of a hydrolic fracture used in oil production. Streaming potential arises due to the leakage of ionic fracking fluid under the rock elastic forces which make the fracture disclosure disappear after pumping stops. The [...] Read more.
The study is motivated by monitoring the space orientation of a hydrolic fracture used in oil production. Streaming potential arises due to the leakage of ionic fracking fluid under the rock elastic forces which make the fracture disclosure disappear after pumping stops. The vector of electric field correlates with the fracture space orientation since the fluid leakage is directed normally to the fracture surfaces. We develop a mathematical model for the numerical evaluation of the streaming potential magnitude. To this end, we perform an asymptotic analysis taking advantage of scale separation between the fracture disclosure and its length. The contrast between the virgin rock fluid and the fluid invading from the fracture is proved to be crucial in a build up of a net charge at the invasion front. Calculations reveal that an increase of the viscosity and resistivity contrast parameters results in an increase of the streaming potential magnitude. Such a conclusion agrees with laboratory experiments. Full article
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