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Chapter
  • Print publication year: 2013
  • Online publication date: November 2013

10 - Particle dispersion and deposition

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Summary

Prologue

Particles entrained in a turbulent fluid are dispersed by velocity fluctuations; they assume a motion that is related to the fluid turbulence. If the suspension flows through a conduit, deposition on a wall depends on the particle turbulence. An understanding of these processes is needed to describe the annular flow regime for which liquid flows along the walls and as drops in the gas flow. The fraction of liquid that is entrained by the gas depends on the rate at which the film is atomized and the rate at which drops deposit on the film.

Equations for trajectories of spherical drops and bubbles in a turbulent flow field are developed. These are used to relate the turbulence properties and the dispersion of particles to the turbulence properties of the fluid in which they are entrained. Of particular interest is the development of relations for the influence of drop size on drop turbulence and on drop dispersion.

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Physics of Gas-Liquid Flows
  • Online ISBN: 9781139649421
  • Book DOI: https://doi.org/10.1017/CBO9781139649421
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