Temperature and velocity of the gas-vapor mixture in the trace of several evaporating water droplets

Research output: Contribution to journalArticle

Abstract

The optical techniques (particle image velocimetry (PIV), laser-induced phosphorescence (LIP), planar laser-induced fluorescence (PLIF)) are used to study unsteady and inhomogeneous temperature and velocity fields of a gas-vapor mixture forming in the immediate vicinity of rapidly evaporating water droplets. Experiments involve various arrangements of several (two, three, and five) water droplets in a heated air flow. We establish the dependencies of the temperature and velocity of a gas-vapor mixture in the trace of each droplet on the heating time, velocity and temperature of the air flow, initial dimensions, and droplet arrangement scheme. Distinctive features of the synergistic effect of a droplet group on their temperature and aerodynamic traces are identified. Longitudinal and transversal dimensions of the aerodynamic and thermal traces of evaporating droplets are established. The length of the temperature trace of one droplet equals 10-12 of its radii, and the width of the temperature and aerodynamic trace of a droplet is no larger than its diameter.

Original languageEnglish
Article number011502
JournalJournal of Heat Transfer
Volume141
Issue number1
DOIs
Publication statusPublished - 1 Jan 2019

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Gases
Vapors
vapors
aerodynamics
Water
gases
water
air flow
Aerodynamics
Temperature
temperature
particle image velocimetry
phosphorescence
laser induced fluorescence
temperature distribution
Phosphorescence
velocity distribution
Lasers
Air
heating

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Temperature and velocity of the gas-vapor mixture in the trace of several evaporating water droplets. / Voytkov, I. S.; Volkov, R. S.; Strizhak, P. A.

In: Journal of Heat Transfer, Vol. 141, No. 1, 011502, 01.01.2019.

Research output: Contribution to journalArticle

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