Page 266 - Formulas and Calculations for Petroleum Engineering

Fluid flow and transport phenomena formulas and calculations Chapter 5 259

Formula(s)

3
g L r r r Þ
ð
l
l
Ar ¼
2
m
Reference: Wikipedia.org.
5.2 Average number of collisions to reduce neutron energy
Input(s)

E o : Initial Energy Level (eV)
E: Final Energy Level (eV)
x: Average Energy Decrement per Collision (dimensionless)

Output(s)
n: Average Number of Collisions to Reduce Neutron Energy (dimensionless)

Formula(s)

1 E o
n ¼ ln
E
x
Reference: Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4.
Chapter 2, Page: 39.

5.3 Average velocity of a falling film with variable viscosity
Input(s)

r: Density (g/cc)
2
g: Acceleration due to Gravity (cm/s )
d: Film Thickness (cm)
b: Inclination (rad)
m: Viscosity (cP)
x: Position in Film (cm)

Output(s)

v: Velocity (cm/s)

Formula(s)

!
2

x 2
r g d cos bðÞ
v ¼ 1
2 m d
Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons.,
Chapter: 2, Page: 48.