Lagrangian statistics for fluid particles and bubbles in turbulence

Details Lagrangian statistics for fluid particles and bubbles in turbulence Lagrangian statistics for fluid particles and bubbles in turbulence

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004njph....6..203m&link_type=abstract

New Journal of Physics, Volume 6, Issue 1, pp. 203 (2004).

Physics

18

Scientific paper

The dispersion of bubbles in homogeneous and isotropic turbulence is numerically examined. The fluid velocity field evolves according to the Navier Stokes equations that are solved by direct numerical simulation. The bubble paths are followed by Lagrangian tracking. The aim of the work is to quantify dispersion properties of bubbles in a regime ranging from low- to high-turbulence velocity fluctuations as compared to the bubble velocity scale, and to compare them to those of fluid particles. Moreover, the forces that are relevant for the bubble dispersion are analysed and their probability density functions, as well as their intermittency characteristics, are compared to those of fluid particle accelerations.

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