scholarly journals Statistics of particle dispersion in direct numerical simulations of wall-bounded turbulence: Results of an international collaborative benchmark test

2008 ◽  
Vol 34 (9) ◽  
pp. 879-893 ◽  
Author(s):  
C. Marchioli ◽  
A. Soldati ◽  
J.G.M. Kuerten ◽  
B. Arcen ◽  
A. Tanière ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Particle Dispersion ◽  
Direct Numerical Simulations ◽  
Benchmark Test ◽  
International Collaborative ◽  
Wall Bounded Turbulence

Measurements of particle dispersion obtained from direct numerical simulations of isotropic turbulence

1991 ◽  
Vol 226 ◽  
pp. 1-35 ◽  
Author(s):  
Kyle D. Squires ◽  
John K. Eaton
Keyword(s):  
Numerical Simulations ◽  
Isotropic Turbulence ◽  
Heavy Particle ◽  
Eddy Diffusivity ◽  
Particle Dispersion ◽  
Direct Numerical Simulations ◽  
Solid Particles ◽  
Particle Inertia ◽  
Eddy Diffusivities ◽  
Particle Drift

Measurements of heavy particle dispersion have been made using direct numerical simulations of isotropic turbulence. The parameters affecting the dispersion of solid particles, namely particle inertia and drift due to body forces were investigated separately. In agreement with the theoretical studies of Reeks, and Pismen & Nir, the effect of particle inertia is to increase the eddy diffusivity over that of the fluid (in the absence of particle drift). The increase in the eddy diffusivity of particles over that of the fluid was between 2 and 16%, in reasonable agreement with the increases reported in Reeks, and Pismen & Nir. The effect of a deterministic particle drift is shown to decrease unequally the dispersion in directions normal and parallel to the particle drift direction. Eddy diffusivities normal and parallel to particle drift are shown to be in good agreement with the predictions of Csanady and the experimental measurements of Wells & Stock.

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