Journal of Engineering Physics and Thermophysics is a translation of Inzhenerno-fizicheskii Zhurnal,
a publication of the Academic Scientific Complex "A. V. Luikov Heat and Mass Transfer Institute"
of the National Academy of Sciences of Belarus
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DIFFUSION MODEL OF LONGITUDINAL AGITATION IN 
HEAT AND MASS TRANSFER PROCESSES.
3. THIRD-LEVEL PROBLEMS

V. V. Zakharenko and T. N. Azyasskaya

UDC 66.040.2:533.6.011.6

The paper is  a continuation of reports  [1, 2]  on  a  diffusion 
model (DM) used for  describing heat and mass transfer processes. 
A heat exchanger  (mass exchanging apparatus)  is  examined  with 
two  flows  moving  in  the  DM  mode  or in a mode of one of the 
limiting cases of  the DM: initial  displacement  (ID)  or  ideal 
agitation (IA). All possible combinations are found. The problems 
are divided into three  levels of complexity of the combinations. 
Derivation of formulas and solutions for determining the carrying 
capacities of the heat exchanger  (mass exchanging apparatus) are 
considered as applied to the problems of the third level.

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