,
(5,1)
(5,2)
- ; - , ; ρ - ; μ - .
, , (ώ).
. , , , ώ> ώ .
Re, , Re= 2320, Re, (Re), .
..
(5,3)
. . ,
(5,4)
Re
.. , ,
(5.5)
..
(5,6)
..
,.
0,022 < Re< 0,29.
(5.3), (5.6), (5.7) Re Re , , Re Re, .
Re , Re k . . , Re.
, , , (k, h, .) .
ώ dp /ds
(5,8)
. aώ>>b ώ2 ; , aώ b ώ2 ; aώ<<b ώ2
|
|
(5,9)
. (5.9) .. .
a b , a=μ/k, b- , ..
(5.10)
- /3; k - 2; - .
, , :
(5,11)
sign - dp/ds; n- , , 1<<2, -2 .
, :
(5,12)
ƒ(m)=10m-2.3
1
, ,
, 10 d0=10 , h=I5 , k=1 2, m=18%, μ=4 *, ρ = 870 /3 140 3/.
2
r, , , , Q=2*10 3/, h=10 , k=0,6 2, μ =19%, μ =1,4*10'2 *, ρ =0,7 /3.
. .. Rep Rep =0,022.
3
, , , Q=200 3/, h=5 , m=16%, k=0,2 2, ρ =0,8 /3,
μ=5 *.
, r=0,1 .