Session E21: Particle-laden Flows II
4:40 PM–6:50 PM, Sunday, November 20, 2011
Room: 324-325
Chair: Changhoon Lee, Yonsei University
Abstract ID: BAPS.2011.DFD.E21.3
Abstract: E21.00003 : Computational and experimental study of charged inertial particles in turbulence
5:06 PM–5:19 PM
Preview Abstract
MathJax On | Off 
Abstract 
Authors:
Jiang Lu
(Physics Department, Michigan Technological University)
Hansen Nordsiek
(Physics Department , University of Maryland)
Raymond Shaw
(Physics Department ,Michigan Technological University)
We have investigated the behavior of electrically charged, inertial particles in homogeneous, isotropic turbulence. Specifically, a drift-diffusion theory describing the scale dependent radial distribution function (RDF) for the particles is evaluated computationally and experimentally. The experiments were carried out in a laboratory chamber that generates nearly homogeneous, isotropic turbulence, and seeded with uniformly charged water droplets. We also report results from a direct numerical simulation (DNS) of turbulence in a periodic box using the pseudospectral numerical method. The numerical study explicitly calculates the interactions of electrically charged inertial particles in homogeneous, isotropic turbulence. Conditions are selected to investigate the effects of mutual electrostatic repulsion of particles on their dynamics, sufficiently strong so as to mimic behavior of a nonideal gas: Coulomb interactions lead to short range repulsion overcoming inertial clustering below a shielding length as seen by a strong reduction in the RDF, but turbulence is sufficiently intense so as to suppress long range correlations (e.g., analogous to thermal energy leading to melting of a Coulomb crystal).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.DFD.E21.3