Particle lagrangian simulation in turbulent flows

Abstract A Lagrangian approach is used to describe particle dispersion in turbulent flows. Fluid particle trajectories are simulated with the aid of a correlation matrix evolving along the particle trajectory. Discrete particles are tracked in a given turbulent field taking into account crossing-trajectory effects, and the influence of the particles on the flow characteristics is deduced from momentum and energy exchanges between both phases. Comparisons of the simulations are given for both experimental and theoretical results for fluid particle diffusion problems. Particle dispersion predictions are presented for grid turbulence experiments, and for three two-phase turbulent round jets, from different authors. Predictions compared favourably with experimental results.

[1]  Wallis S. Hamilton,et al.  Forces on a sphere accelerating in a viscous fluid , 1964, Journal of Fluid Mechanics.

[2]  M. Wells,et al.  The effects of crossing trajectories on the dispersion of particles in a turbulent flow , 1983, Journal of Fluid Mechanics.

[3]  F. Durst,et al.  Eulerian and Lagrangian predictions of particulate two phase flows , 1984 .

[4]  Philippe Desjonqueres,et al.  Modélisation lagrangienne du comportement de particules discrètes en écoulement turbulent , 1987 .

[5]  Gérard Gouesbet,et al.  MODELLING AND PREDICTING TURBULENCE FIELDS AND THE DISPERSION OF DISCRETE PARTICLES TRANSPORTED BY TURBULENT FLOWS , 1986 .

[6]  M. Reeks.  On the dispersion of small particles suspended in an isotropic turbulent fluid , 1977, Journal of Fluid Mechanics.

[7]  B. Launder,et al.  The numerical computation of turbulent flows , 1990 .

[8]  W. Rodi.  Turbulence models for environmental problems , 1979 .

[9]  J. Lumley,et al.  Some measurements of particle velocity autocorrelation functions in a turbulent flow , 1971, Journal of Fluid Mechanics.

[10]  Said Elghobashi,et al.  Two-component LDA measurement in a two-phase turbulent jet , 1983 .

[11]  Said Elghobashi,et al.  Prediction of the particle-laden jet with a two-equation turbulence model , 1984 .

[12]  A. Gosman,et al.  Aspects of computer simulation of liquid-fuelled combustors , 1981 .

[13]  R. Clift,et al.  Bubbles, Drops, and Particles , 1978 .

[14]  TURBULENT DISPERSION IN DRAG REDUCING FLUIDS , 1974 .

[15]  Gérard Gouesbet,et al.  Dispersion of discrete particles by continuous turbulent motions: New results and discussions , 1986 .

[16]  Gerard M. Faeth,et al.  Structure of particle-laden jets - Measurements and predictions , 1984 .