Dispersion of discrete particles by continuous turbulent motions. Extensive discussion of the Tchen's theory, using a twoparameter family of Lagrangian correlation functions
Abstract
The theory of dispersion of discrete particles by continuous turbulent motions is first expressed in a 3D formalism, as a synthesis between the 1D Tchen's theory of dispersion and the 3D Batchelor's theory of diffusion. Then it is exemplified with the aid of a twoparameter Frenkiel family of Lagrangian correlation functions, taking into account the Basset's term or neglecting it. It is then shown and explained that even dense discrete particles may disperse faster than fluid particles. That work is included in a more general framework aiming at modeling and predicting the behavior of discrete particles in turbulent flows.
 Publication:

Physics of Fluids
 Pub Date:
 April 1984
 DOI:
 10.1063/1.864711
 Bibcode:
 1984PhFl...27..827G
 Keywords:

 Dispersing;
 EulerLagrange Equation;
 Particle Diffusion;
 Turbulent Diffusion;
 Two Phase Flow;
 Air Water Interactions;
 Correlation;
 Discrete Functions;
 Particle Motion;
 Three Dimensional Flow;
 Turbulent Flow;
 Fluid Mechanics and Heat Transfer