Effect of Gravity on Sheared Turbulence Laden With Bubbles or Droplets

Abstract

This report studies the dynamics of particle-laden turbulent flows. Specifically, it addresses the effect of the turbulence on the concentration field and drift velocity of spherical particles. The coupling between the particle accumulation and the modification of the drift velocity is also investigated. Turbulent flows with and without mean shear are analyzed and the effect of the turbulent length scales on the behavior of the particles is described. The effect of the density ratio between the disperse and the continuous phase was considered in the two extreme cases of water droplets in air (1000) and air bubbles in water (1/1000).

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Document Details

Document Type
Technical Report
Publication Date
Oct 30, 2004
Accession Number
ADA432992

Entities

People

  • Juan C. Lasheras

Organizations

  • University of California, San Diego

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Buoyancy
  • Dynamics
  • Energy Transfer
  • Flow
  • Flow Visualization
  • Fluid Dynamics
  • Froude Number
  • Hydrodynamics
  • Image Processing
  • Laser Beams
  • Measurement
  • Particles
  • Stratified Fluids
  • Turbulence
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Aerosol Science/Aerosol Physics
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.