, : R - , ( ), R , . , , . 1-11-21-2-1 , . 5.1. , u. , - . , .. .
. 5.1. Ru
, , , , dm , dt, :
. (5.1)
(5.1) , , , . d l2 F2=pdl2. dm 1-11 2-21 dt.
(5.1) dm/dt=G :
. (5.2)
, (Ru= - Ru1), :
. (5.3)
u, , . Nu, ( N,), Nu=uRu. (5.3)
. (5.4)
. (5.5)
, Nu Lu .
(5.1) ( ) :
. (5.6)
, (Ra= - Ra1)
. (5.7)
, , .
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