On Radiation Absorption Effects And Air
Humidity Influence On Evaporating Water
Droplets And Vapour Condensation Intensity
Author(s)
G. Miliauskas, S. Sinkunas & K. Sinkunas
Abstract
This paper discusses modelling of water droplet heating and evaporation in
humid air. The effect of black body spectral radiation of the air temperature on
the combined heat transfer in the water droplet has been evaluated. A combined
analytical and numerical method of investigation is applied. Securing the balance
of energy fluxes in the droplet with a confidence of one hundredth of a percent,
the method of fastest descent has been used to determine the droplet surface
temperature. Thermal state and phase transformation dynamics for the warming
droplets heated in a humid air environment are modelled under conductive and
combined conductive-radiative heating.
Keywords: humid air, water droplet, combined heat and mass transfer, droplet
heating and evaporation, condensation.
1 Introduction
The research of water droplet heat and mass transfer is connected with
application of sprayed water technology in power energy and other industries.
The problem of droplet evaporation has been researched for more than a hundred
years [1]. Demand to improve technology which employs liquids in the sprayed
form requires further understanding of combined heat and mass transfer
processes in liquid droplets under wide range of conditions. Applied methods for
investigation of heat and mass transfer in liquid droplet are systematically
reviewed in [2]. There has been an objective for particular consideration of
unsteady combined heat and mass transfer processes in recent years [3–9]. The
methods developed for analytical and numerical investigation of droplet
combined heat and mass transfer allows modelling of more complex processes
and their interactions.
Keywords
humid air, water droplet, combined heat and mass transfer, droplet
heating and evaporation, condensation.
Related Book
Other papers in this volume
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