Direct numerical simulations of homogeneous isotropic turbulence laden with particles have been conducted to clarify the relationship between particle dispersion and coherent fine scale eddies in turbulence. Dispersion of 106 particles are analyzed for several particle Stokes numbers. The spatial distributions of particles depend on their Stokes number, and the Stokes number that causes preferential concentration of particles is closely related to the time scale of coherent fine scale eddies in turbulence. On the plane perpendicular to the rotating axes of fine scale eddies, number density of particle with particular Stokes number is low at the center of the fine scale eddy, and high in the regions with high energy dissipation rate around the eddy. The maximum number density can be observed at about 1.5 to 2.0 times the eddy radius on the major axis of the fine scale eddy.
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ASME/JSME 2007 5th Joint Fluids Engineering Conference
July 30–August 2, 2007
San Diego, California, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-4288-6
PROCEEDINGS PAPER
Particle Dispersion in Fine Scales of Homogeneous Isotropic Turbulence
M. Sato,
M. Sato
Tokyo Institute of Technology, Tokyo, Japan
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M. Tanahashi,
M. Tanahashi
Tokyo Institute of Technology, Tokyo, Japan
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T. Miyauchi
T. Miyauchi
Tokyo Institute of Technology, Tokyo, Japan
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M. Sato
Tokyo Institute of Technology, Tokyo, Japan
M. Tanahashi
Tokyo Institute of Technology, Tokyo, Japan
T. Miyauchi
Tokyo Institute of Technology, Tokyo, Japan
Paper No:
FEDSM2007-37234, pp. 1329-1337; 9 pages
Published Online:
March 30, 2009
Citation
Sato, M, Tanahashi, M, & Miyauchi, T. "Particle Dispersion in Fine Scales of Homogeneous Isotropic Turbulence." Proceedings of the ASME/JSME 2007 5th Joint Fluids Engineering Conference. Volume 1: Symposia, Parts A and B. San Diego, California, USA. July 30–August 2, 2007. pp. 1329-1337. ASME. https://doi.org/10.1115/FEDSM2007-37234
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