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Multiphase Science and Technology
SJR: 0.183 SNIP: 0.483 CiteScore™: 0.5

ISSN Print: 0276-1459
ISSN Online: 1943-6181

Multiphase Science and Technology

DOI: 10.1615/MultScienTechn.v1.i1-4.20
pages 99-279

THE SPHERICAL DROPLET IN GASEOUS CARRIER STREAMS: REVIEW AND SYNTHESIS

George Gyarmathy
BBC Brown Boveri & Co., Ltd. Baden, Switzerland

ABSTRACT

This paper considers the thermodynamic and kinematic behaviour of a droplet in gaseous carrier flow. After reviewing the known (continuum-type and free-molecule type) laws of heat, mass and momentum exchange between two phases, several comprehensive expressions with multi-range validity are synthesized. In addition, a new mathematic model is developed to predict the change rate of droplet size, surface temperature and velocity. The model infers that a close analogy of heat, mass and momentum transfer is maintained at all Knudsen (Kn) numbers at any carrier density and almost any droplet size.


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