Page 271 - Formulas and Calculations for Petroleum Engineering

264 Formulas and calculations for petroleum engineering

Formula(s)

ð P P Þ R
o
L
τ ¼
R
2 L
!
4 4 τ τ
4
ð
L
o
3:142 P P Þ R r o o
Q ¼ 1 +0:333
8 m L 3 τ τ
R R
Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons,
Chapter: 8, Page: 260.
5.13 Calculation of mass flow rate
Input(s)
3
r: Density (kg/m )
2
g: Gravitational Acceleration (m/s )
d: Film Thickness (m)
W: Width (m)
2
n: Kinematic Viscosity (m /s)
Output(s)
w: Mass Flow Rate (kg/s)

Formula(s)

3
r g d W
w ¼
3 n
Reference: Bird, R.B., Stewart, W.E., and Lightfoot, E.N. (2002). Transport Phenomena (Second ed.). John Wiley & Sons,
Chapter: 2, Page: 47.

5.14 Calculation of momentum flux

Input(s)
m: Fluid Viscosity (cP)
dv x : Change in Velocity in the x-direction (ft/s)
dy: Plate Separation in the y-direction (ft)

Output(s)
2
τ yx : Momentum Flux (lb f/ft )

Formula(s)

dv
5 x
τ ¼ 2:0886 10 m
yx
dy
Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second ed.). John Wiley & Sons,
Chapter: 1, Page: 15.