Special Issue "Electro- and Magneto-hydrodynamic Manipulation of Particles Suspended in Fluids"

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

Deadline for manuscript submissions: 1 December 2019.

Special Issue Editors

Guest Editor
Dr. Pushpendra Singh

Department of Mechanical Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA
Website | E-Mail
Interests: fluid dynamics; viscoelastic fluids; multiphase and particulate flows; biological fluid mechanics; microfluidics; electrohydrodynamics
Guest Editor
Dr. Shriram Pillapakkam

Department of Mechanical Engineering, Temple University, Philadelphia, PA 19122, USA
Website | E-Mail
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

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Fluids is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

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

Open AccessArticle
Ionic Fracture Fluid Leak-Off
Received: 10 January 2019 / Revised: 5 February 2019 / Accepted: 15 February 2019 / Published: 19 February 2019
PDF Full-text (915 KB) | HTML Full-text | XML Full-text
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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