SIMULATION AND NUMERICAL INVESTIGATIONS OF THE KINETICS 
OF ATMOSPHERIC AEROSOL DROPLETS IN THE WAKE BEHIND A FLAT PLATE

A. G. Zdor

UDC 532.529

Within the framework of the physicomathematical model 
of evolution of a polydisperse condensate, numerical investigations 
of the kinetics of atmospheric aerosol droplets in a supersonic two-phase 
flow past a flat plate were carried out. The gas flow was described 
by the Reynolds equations with the use of the two-parameter turbulence 
model. In view of the smallness of the condensate mass fraction in 
the incoming flow, the inverse effect of the dispersed phase on the 
gas was not considered. For various regimes of exposure to a flow, 
the characteristic features of the spatial distribution of the main 
parameters of the condensate fractions have been studied: the number 
densities, radii, temperatures, and averaged velocities of microdrops. 
The dependence of the dispersed phase dynamics on the Mach number 
and the incoming flow angle of attack has been investigated and the 
influence of the allowance for the processes of coagulation/fragmentation 
on the mass spectrum of droplets is shown.

Keywords: supersonic two-phase flow, polydisperse 
condensate, turbulent pulsations. 

N. E. Zhukovskii Central Aero-Hydrodynamics Institute, 1 Zhukovskii Str., 
Zhukovskii, Moscow District, 140160, Russia. Translated from Inzhenerno-
Fizicheskii Zhurnal, Vol. 82, No. 2, pp. 331-341, March-April, 2009. 
Original article submitted November 5, 2008.