INFLUENCE OF GROWING DROPLETS ON THE INTENSITY OF THE RECONDENSATION PROCESS

Results of a numerical simulation of the infl uence of the droplets having variable radii on the intensity of transfer process in the problem on the evaporation of liquid and the condensation of its vapor are presented. On the basis of the preliminary estimates, the possibility of formation of droplets at a distance, equal to several mean free paths of vapor molecules from am evaporation surface, was demonstrated. The calculations were perfumed with regard for the formation of droplets at the stationary and nonstationary stages of the recondensation process on the assumption that the droplets are immovable and that their temperature remains unchanged. It was established that the droplets present in a vapor fl ow, whose sizes increase as a result of the condensation of vapor on them, can substantially infl uence the intensity of mass transfer in the vapor fl ow and that this infl uence decreases substantially or disappears in the process of movement of the droplets and with increase in their temperature
Results of a numerical simulation of the infl uence of the droplets having variable radii on the intensity of transfer process in the problem on the evaporation of liquid and the condensation of its vapor are presented. On the basis of the preliminary estimates, the possibility of formation of droplets at a distance, equal to several mean free paths of vapor molecules from am evaporation surface, was demonstrated. The calculations were perfumed with regard for the formation of droplets at the stationary and nonstationary stages of the recondensation process on the assumption that the droplets are immovable and that their temperature remains unchanged. It was established that the droplets present in a vapor fl ow, whose sizes increase as a result of the condensation of vapor on them, can substantially infl uence the intensity of mass transfer in the vapor fl ow and that this infl uence decreases substantially or disappears in the process of movement of the droplets and with increase in their temperature
Author:  V. Yu. Levashov, I. N. Shishkova, A. P. Kryukov
Keywords:  vapor, droplets, evaporation, homogeneous condensation, Boltzmann kinetic equation
Page:  1710