Physics of Fluids - Publications

The interaction between a solid particle and a turbulent flow

New Journal of Physics 12, 033040 (2010)

Authors

	Aurore Naso
	Andrea Prosperetti

BibTeΧ

@article{1367-2630-12-3-033040,
  author={Aurore Naso and Andrea Prosperetti},
  title={The interaction between a solid particle and a turbulent flow},
  journal={New Journal of Physics},
  volume={12},
  number={3},
  pages={033040},
  url={http://stacks.iop.org/1367-2630/12/i=3/a=033040},
  year={2010},
  abstract={The interaction between a fixed solid spherical particle and stationary turbulence with zero mean flow is investigated numerically. The object diameter, D , lies in the inertial range ( D ≈0.6 L ≈0.9λ≈8η, where L , λ and η, respectively, denote the integral scale, the Taylor microscale and the Kolmogorov length) and the particle Reynolds number is close to 20. It is found that the turbulence statistics at different distances from the solid/fluid interface are modified by the presence of the object in a region that extends more than 10 times further than the viscous layer. This estimate is confirmed by the analysis of the correlation between the force and torque on the particle and the force and torque on spherical surfaces surrounding the particle, although the torque decorrelates somewhat faster with increasing distance from the object surface. The angular slip velocity of the particle, a quantity of crucial importance for the modeling of the turbulent transport of large objects, is also characterized.}
}