Dispersion of gas bubbles in large-scale homogeneous isotropic turbulence

A. Biesheuvel, P.D.M. Spelt

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Abstract

An approximate analysis is given of the dispersion of gas bubbles that rise at large Reynolds number through large-scale homogeneous, isotropic turbulence, characterized by the Kraichnan energy-spectrum function. A fairly well-established equation of motion of the bubbles, originally proposed by Thomas et al. [16], is used to derive a closed set of equations for the components of the dispersion tensor of the bubbles in a manner analogous to that used by Saffman [12] for fluid particles and by Pismen and Nir [10, 11] for solid particles. The equations are then solved to obtain the diffusivities and the intensities of bubble velocity fluctuations. Analytical solutions are compared with results from simulations of the bubble motion in a Gaussian random velocity field.
Original languageUndefined
Pages (from-to)463-482
JournalApplied scientific research
Volume58
Issue number1-4
DOIs
Publication statusPublished - 1997

Keywords

  • homogeneous isotropic turbulence
  • Bubble dynamics
  • IR-85790
  • Turbulent dispersion

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