
14 Industrial Air Quality and Ventilation
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the Soviet Union by O. D. Neykov (1965), E. N. Boshnyakov (1965), and V. A. Minko
(1969), and in the United States by Hatch (1954), Hemeon (1955), Anderson (1964),
and Cruise and Bianconi (1966). The second stage will be discussed in Section 1.2.3
of this chapter.
1.2.1 Butakov–Hemeon moDel anD Its DeveloPment
The Butakov–Hemeon model was built on the assumption that part of the momen-
tum energy of a stream of particles E
1
is lost when surmounting environmental resis-
tance. These losses are determined through the material particles’ air drag R
0
:
dE
1
= N
k
⋅ R
0
⋅ dx = N
k
⋅ ...