Page 524 - Standard Handbook Petroleum Natural Gas Engineering VOLUME2

480 Production

Table 6-21
Drfft-Flux Parameters for Slug Flow Ri lime
Pipe Inclination CO
1
80' < 8 5 90" 1.2 0.35

00 < 8 -C 80" 1.3 0.50
8-0 1.3 0
-800 S 8 < 0' 1.3 -0.5*

-goo< 8 < -800 0.9 -0.6*
small as a result of having the
mixture superficial velocity, V,,very small, then the slug
velocity, V,, should be limited to the mixture velocity.

'CL)

O.O46/Re:' ifReL= ( - 11,500
f, =
(6-96b)
(16/ReL if Re, e 1,500

(6-96~)

The frictional pressure gradient is then calculated by
(g)f=-(v) ' (697a)

and the gravitational pressure gradient is

(6-973)

For vertical flow, the fractional pressure gradient is calculated by

where yb, from Equation 6-96~ with = 0.75
H, = = liquid superficial velocity
v, avg. liquid velocity in slug flow
and fm, from Equation 6-966, using the mixture velocity v,,, (replacing v,) in the
Reynolds number.