1.  Alternatively, Strigle (Reference: Kister, H. Z.
Distillation Design, 1992) has replotted the flooding
correlation with the following co-ordinates:
0.5
G  ρ 
X:  L  G  = flow parameter
G  ρ 
 G  L 
0.5
 ρ  0.5 0.05
Y: V  G
G ρ −ρ

 ( ) ( L)
F
P
ν = capacity parameter
 L G 
1

2. Strigle’s chart (random packing)
2

3. Strigle’s chart (structured packing)
3

4.  Nomenclature for the previous 3 slides:
G
V = superficial gas velocity = G , ft
G ρ s
G
lb lb
ρ = gas density, m ; ρ = liquid density, m
G ft 3 L ft 3
F = packing factor, ft −1
P
µ
ν = liquid kinematic viscosity = L ; centiStokes
L
(ρ 62.4
L )
µ = liquid viscosity, centiPoise
L
lb lb
G = liquid mass velocity, m ; G = gas mass velocity, m
L s ft 2 G s ft 2
4

5. NOTE for the previous 4 slides:
 The CAPACITY PARAMETER is NOT dimensionless
and therefore, only the prescribe units should be used.
 This correlation predicts pressure drop within ±11%
accuracy.
 The packing factor FP decreases with packing size, and
determined empirically. These values are available in
literature.
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