Bubble Dissolving in Turbulent Pipe Flow

Abstract

Measurements are presented of bubble dissolving in turbulent pipe flow at pipe Reynolds numbers of 2xlO4, lxlO5 and 2xlO5, based on pipe diameter. The mass transfer coefficient is determined and it increases with Reynolds number. The coefficient appears to be independent of bubble size for the diameter range of 20-170 Jim. The mass transfer Nusselt number is determined and depends approximately on the bubbles' Peclet number to the one half power. The values of the mass transfer coefficients are similar to those for the same size bubbles rising buoyantly in still water. Suppression of dissolving by bubble rotation is hypothesized to prevent a significant increase in dissolving for the turbulent flow regime compared to the rising bubble regime. Surfactants in the water are also suspected of slowing the dissolving rates.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1992
Accession Number
ADA252927

Entities

People

  • Scott Gowing

Organizations

  • Naval Surface Warfare Center Carderock Division

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Boundary Layer
  • Coefficients
  • Detectors
  • Diameters
  • Diffusion
  • Flow
  • Light Sources
  • Mass Transfer
  • Measurement
  • Pipe Flow
  • Pressure Gages
  • Pressure Gradients
  • Pressure Measurement
  • Reynolds Number
  • Turbulent Diffusion
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Chemistry
  • Environmental science
  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Combustion and Flow Dynamics.
  • Underwater engineering and Marine Technology.