Journal article
Modeling and simulation of dielectrophoretic particle–particle interactions and assembly
Journal of colloid and interface science, Vol.394(1), pp.619-629
03/15/2013
Handle:
https://hdl.handle.net/2376/103614
PMID: 23348000
Abstract
[Display omitted]
► Physics behind particle chaining with multiple similar and dissimilar particles are shown. ► Interface-resolved methods are used for dielectrophoretic force calculations. ► Particle chaining can be formed regardless of the particle number and initial orientation. ► The assembly mechanism for dissimilar particles is faster than that of similar particles.
Electric field induced particle–particle interactions and assembly are of great interest due to their useful applications in micro devices. The behavior of particles becomes more complex if multiple particles interact with each other at the same time. In this paper, we present a numerical study of two dimensional DC dielectrophoresis based particle–particle interactions and assembly for multiple particles using a hybrid immersed interface-immersed boundary method. The immersed interface method is employed to capture the physics of electrostatics in a fluid media with suspended particles. Particle interaction based dielectrophoretic forces are obtained using Maxwell’s stress tensor without any boundary or volume integration. This electrostatic force distribution mimics the actual physics of the immersed particles in a fluid media. The corresponding particle response and hydrodynamic interactions are captured through the immersed boundary method by solving the transient Navier–Stokes equations. The interaction and assembly of multiple electrically similar and dissimilar particles are studied for various initial positions and orientations. Numerical results show that in a fluid media, similar particles form a chain parallel to the applied electric field, whereas dissimilar particles form a chain perpendicular to the applied electric field. Irrespective of initial position and orientation, particles first align themselves parallel or perpendicular to the electric field depending on the similarity or dissimilarity of particles. The acceleration and deceleration of particles are also observed and analyzed at different phases of the assembly process. This comprehensive study can be used to explain the multiple particle interaction and assembly phenomena observed in experiments.
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Details
- Title
- Modeling and simulation of dielectrophoretic particle–particle interactions and assembly
- Creators
- Mohammad Robiul Hossan - Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, USARobert Dillon - Department of Mathematics, Washington State University, Pullman, WA 99164-3113, USAAjit K Roy - Air Force Research Lab, Wright Patterson Air Force Base, OH 45433-7750, USAPrashanta Dutta - Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, USA
- Publication Details
- Journal of colloid and interface science, Vol.394(1), pp.619-629
- Academic Unit
- Mathematics and Statistics, Department of; Mechanical and Materials Engineering, School of
- Publisher
- Elsevier Inc
- Identifiers
- 99900546685901842
- Language
- English
- Resource Type
- Journal article