ON THE COLLISIONS OF VERY SMALL CLOUD DROPS,

Abstract

Conclusions: Some of the hydrodynamic force expressions used by Hocking (The collision efficiency of small drops, Quart. J. Roy. Met. Soc., 85, 44-50 (1959)) are incorrect for close droplet separations. His conclusions should therefore be regarded with suspicion. Preliminary results based on an improved Stokesian hydrodynamic theory show no evidence for the 19-micron collision efficiency cut-off. The Stokes approximation is inadequate at Reynolds numbers as small as 0.25 for nearly equal spheres. Its range of validity in the twosphere hydrodynamic problem should be investigated. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1966
Accession Number
AD0626606

Entities

People

  • M. H. Davis

Organizations

  • RAND Corporation

Tags

DTIC Thesaurus Topics

  • Collisions
  • Efficiency
  • Fluid Dynamics
  • Fluid Mechanics
  • Reynolds Number

Fields of Study

  • Physics

Readers

  • Calculus or Mathematical Analysis
  • Fluid Dynamics.
  • Regression Analysis.