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.  PROBLEMS OF THE 2nd LEVEL 
V. V. Zakharenko and T. N. Azyasskaya
UDC 66.040.2:533.6.011.6
The paper is a continuation of [1] on systematization of 
the  employment of a diffusion model (DM) for describing 
heat   and   mass   transfer  processes.  The  object of 
consideration is  a heat exchanger  (a  mass  exchanging 
apparatus) with two flows moving in the DM regime, ideal 
displacement,   and   ideal   agitation.   All  possible 
combinations   of   them  are  found.  The  problems are 
distributed according  to  three  levels  of complexity. 
The solution of problems of the 2nd level is considered.
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