Page 305 - Formulas and Calculations for Petroleum Engineering

298 Formulas and calculations for petroleum engineering

Formula(s)

0 1
0 1
3
1
B p R rC ð P P Þ R n
L
o
w ¼ B C @ A
@ 1 A 2 m L
+3
n
Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons,
Chapter: 8, Page: 243.
5.93 Laplace number
Input(s)

r: Density (kg/m )
3
L: Characteristic Length (m)
s: Particle Hard Shell Dia (N/m)
m: Liquid Viscosity (Pa s)

Output(s)
La: Laplace number (dimensionless)

Formula(s)

L
La ¼ s r
2
m
Reference: Wikipedia.org.

5.94 Lewis number

Input(s)

a: Thermal Diffusivity (m /s)
2
D: Mass diffusivity (m /s)
2
Output(s)

Le: Lewis number (dimensionless)

Formula(s)

a
Le ¼
D
Reference: Wikipedia.org.

5.95 Mach number
Input(s)

v: Velocity of source relative to medium (m/s)
vs: Speed of sound in the medium (m/s)