Heat and mass transfer at adiabatic evaporation of
binary zeotropic solutions
M.S. Makarov and S.N. Makarova
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
E-mail: snmakarova@itp.nsc.ru
Keywords: heat and mass transfer, boundary layer, adiabatic evaporation, binary solution
Pages: 23–32
Abstract
Results of numerical
simulation of heat and mass transfer in a laminar flow of three-component
gas at adiabatic evaporation of binary solutions from a flat plate are
presented. The studies were carried out for the perfect solution
of ethanol/methanol and zeotrope solutions of water/acetone, benzene/acetone,
and ethanol/acetone. The liquid-vapor equilibrium
is described by the Raoult law for the ideal solution and
Carlson–Colburn model for real solutions. The effect of gas temperature and liquid composition
on the heat and diffusion flows, and temperature of vapor-gas mixture
at the interface is analyzed. The formula for calculating
the temperature of the evaporation surface for the binary liquid
mixtures using the similarity of heat and mass transfer was proposed. Data
of numerical simulations are in a good agreement with the results of
calculations based on the proposed dependence for all examined liquid
mixtures in the considered range of temperatures and pressures.
DOI: 10.1134/S0869864316010030
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