期刊
JOURNAL OF FLUID MECHANICS
卷 698, 期 -, 页码 160-167出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/jfm.2012.72
关键词
homogeneous turbulence; isotropic turbulence; particle/fluid flows
资金
- COST Action [MP0806]
- Max Planck Society
- Marie Curie Fellowship
- Programme PEOPLE - Call [237521]
We report experimental results on the dynamics of heavy particles of the size of the Kolmogorov scale in a fully developed turbulent flow. The mixed Eulerian structure function of two-particle velocity and acceleration difference vectors was observed to increase significantly with particle inertia for identical flow conditions. We show that this increase is related to a preferential alignment between these dynamical quantities. With increasing particle density the probability for those two vectors to be collinear was observed to grow. We show that these results are consistent with the preferential sampling of strain-dominated regions by inertial particles.
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