Conference proceeding
CONTROLLING MIXING INSIDE A DROPLET BY TIME DEPENDENT RIGID-BODY ROTATION
PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, VOL 13, PTS A AND B, pp.985-990
01 Jan 2009
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The use of microscopic discrete fluid volumes (i.e., droplets) as microreactors for digital microfluidic applications often requires mixing enhancement and control within droplets. In this work, we consider a translating spherical liquid droplet to which we impose a time periodic rigid-body rotation which we model using the superposition of a Hill vortex and an unsteady rigid body rotation. This perturbation in the form of a rotation not only creates a three-dimensional chaotic mixing region, which operates through the stretching and folding of material lines. but also offers the possibility of controlling both the size and the location of the mixing. Such a control is achieved by judiciously adjusitng the three parameters that characterize the rotation, i.e., the rotation amplitude, frequency and orientation of the rotation. As the size of the mixing region is increased, complete mixing within the drop is obtained.
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Details
- Title
- CONTROLLING MIXING INSIDE A DROPLET BY TIME DEPENDENT RIGID-BODY ROTATION
- Creators
- Rodolphe Chabreyrie - Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USADmitri VainchteinCristel ChandrePushpendra SinghNadine Aubry - Carnegie Mellon Univ, Dept Mech Engn, Pittsburgh, PA 15213 USA
- Publication Details
- PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, VOL 13, PTS A AND B, pp.985-990
- Conference
- ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, VOL 13
- Publisher
- Amer Soc Mechanical Engineers
- Number of pages
- 6
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- C. and J. Nyheim Plasma Institute
- Identifiers
- 991021861646604721
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- Web of Science research areas
- Engineering, Mechanical
- Nanoscience & Nanotechnology