A STOCHASTIC MODEL OF DISPERSE SYSTEMS S. V. Mavrin , A. V. Sten'gach , and A. A. Potanin UDC 536.21 We suggest a model of the structure of a disperse system that reflects the random character of the topology. We evaluate the effect of the stochastic nature of the topology on the effective conductivity. An asymptotic decrease in the conductivity with increase in the scale of the heat and mass transfer is established and explained. JEPTER74920199912 JEPTER7492012