Prediction of particle dispersion in turbulent flows
Abstract
A model of particle behavior in turbulent flows is presented. Each particle trajectory is computed by numerically integrating the particle governing equations, with a random sampling to determine the instantaneous fluid velocity experienced by each particle. To take into account spatial and temporal structures of the turbulence, fluid domains are simultaneously tracked; their sizes and lifetimes are connected with length and time scales of turbulence. A particle can follow a fluid domain, or can move from one to one another (crossing trajectories effect). The presence of particles is assumed not to alter turbulent structures. Particle dispersion is determined from a sample of computed trajectories. Predictions agree favorably with experimental data for the gridgenerated turbulence.
 Publication:

PhysicoChemical Hydrodynamics
 Pub Date:
 1984
 Bibcode:
 1984PhChH...5..229O
 Keywords:

 Computerized Simulation;
 Particle Diffusion;
 Particle Trajectories;
 Trajectory Analysis;
 Turbulence Effects;
 Turbulent Flow;
 Flow Velocity;
 Numerical Integration;
 Prediction Analysis Techniques;
 Random Sampling;
 Fluid Mechanics and Heat Transfer