NUMERICAL-ANALYTICAL INVESTIGATION OF SELF-SIMILAR REGIMES 
OF PROPAGATION OF NONSTATIONARY CONVECTIVE JETS
AND THERMALS IN A HOMOGENEOUS MEDIUM
OVER A POINT HEAT SOURCE
A. N. Vul'fson

UDC 532.529.2:536.24+551.511.6

An integral model of a nonstationary vertical convective 
jet is suggested that involves a universal equation of the propagation 
of the upper boundary of a convective front depending on the power 
of the point heat source. A class of self-similar solutions is considered; 
they correspond to the heat sources whose power changes instantly 
and also according to the power and exponential laws. Analytical and 
numerical solutions of the self-similar equations are constructed. 
Numerical calculations are compared with the well-known experimental 
data on the profiles of the vertical velocity and temperature on the 
jet axis.

Moscow State Institute of Electronics and Mathematics, 
Moscow, Russia; email: matan@miem.edu.ru. Translated from Inzhenerno-Fizicheskii 
Zhurnal, Vol. 74, No. 3, pp. 92-99, May-June, 2001. 
Original article submitted October 4, 2000.

JEPTER7492020017
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