Page 278 - Formulas and Calculations for Petroleum Engineering

Fluid flow and transport phenomena formulas and calculations Chapter 5 271

Formula(s)

1
D ¼
AB 0:5
M

Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons,
Chapter: 17, Page: 532.

5.30 Diffusion Into a falling liquid film (gas absorption)

Input(s)
3
c: Concetration (mol/cm )
2
D AB : Diffusivity (cm /s)
v max : Velocity of Dropping Particle (cm/s)
z: Height of Column (cm)

Output(s)
2
N: Molar Flux (mol/cm s)

Formula(s)

0:5
D AB v max

N ¼ c
p z
Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons,
Chapter: 18, Page: 560.

5.31 Diffusion of low-density gases with equal mass
Input(s)

T: Temperature (K)
M A : Mass of Component A (g)
M B : Mass of Component B (g)
s AB : Collision Diameter (cm)
P: Pressure (atm)
O: Collision integral (dimensionless)

Output(s)
2
D AB : Diffusivity (cm /s)

Formula(s)

! !
0:5
1 1 1
3
D ¼ 0:0018583 T * +
AB 2
M M
A B P s AB O
Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons,
Chapter: 17, Page: 526.