0
Research Papers: Two-Phase Flow and Heat Transfer

Numerical Study of Dielectric Fluid Bubble Behavior Within Diverging External Electric Fields

[+] Author and Article Information
Matthew R. Pearson

Two-Phase Flow and Heat Transfer Enhancement Laboratory, Mechanical, Materials, and Aerospace Engineering Department, Illinois Institute of Technology, 10 W. 32nd Street, Chicago, IL 60616pearmat@iit.edu

Jamal Seyed-Yagoobi

Two-Phase Flow and Heat Transfer Enhancement Laboratory, Mechanical, Materials, and Aerospace Engineering Department, Illinois Institute of Technology, 10 W. 32nd Street, Chicago, IL 60616yagoobi@iit.edu

J. Heat Transfer 130(3), 032901 (Mar 06, 2008) (10 pages) doi:10.1115/1.2804937 History: Received September 05, 2006; Revised May 25, 2007; Published March 06, 2008

A three-dimensional mathematical model is presented that models bubble deformation of a dielectric fluid due to the presence of a nonuniform electric field and calculates the net dielectrophoretic force that is exerted by the electric field on the bubble. The study includes the development of a method of predicting the shape of a bubble based on the arbitrary distribution of stresses over its surface without requiring an axisymmetric configuration. The reciprocal effect of the bubble’s presence on the electric field is also incorporated into the model, and dimensional analysis is used to obtain a single key parameter that governs the bubble deformation phenomenon. Numerical implementation of the mathematical model shows that the bubble deformation can be significant. Furthermore, bubble deformation and electric field distortion can have significant effects on the dielectrophoretic behavior of bubbles in nonuniform fields, especially within small-scale devices where the bubble size and electrode spacing are similar in magnitude.

FIGURES IN THIS ARTICLE
<>
Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Schematic of electrode configuration

Grahic Jump Location
Figure 2

Boundary conditions for Eq. 15

Grahic Jump Location
Figure 3

Comparison of numerically computed and experimentally observed bubble shapes (24)

Grahic Jump Location
Figure 4

Bubble shape—xz view, BoE=2.5

Grahic Jump Location
Figure 5

Bubble shape—xz view, BoE=5.0

Grahic Jump Location
Figure 6

Bubble shape—xz view, BoE=7.5

Grahic Jump Location
Figure 7

Schematic of constant electric field lines and elongation angle

Grahic Jump Location
Figure 8

Bubble shape—yz view, BoE=2.5

Grahic Jump Location
Figure 9

Bubble shape—yz view, BoE=5.0

Grahic Jump Location
Figure 10

Bubble shape—yz view, BoE=7.5

Grahic Jump Location
Figure 11

Isopotential lines—y*=0, BoE=2.5

Grahic Jump Location
Figure 12

Isopotential lines—y*=0, BoE=5.0

Grahic Jump Location
Figure 13

Isopotential lines—y*=0, BoE=7.5

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In