Page 276 - Formulas and Calculations for Petroleum Engineering

Fluid flow and transport phenomena formulas and calculations Chapter 5 269

5.25 Determination of the controlling resistance

Input(s)
S: Solubility (mol/cc)
M: Mass (g)
x a : Partial Pressure (kPa)
S o : Solubility at NTP (mol/cc)
c l : Concentration of Liquid (g mol/cc)
c g : Concentration of Gas (g mol/cc)
2
D AB : Diffusivity in the Liquid Phase (cm /s)
2
D AC : Diffusivity in the Gas Phase (cm /s)

Output(s)
m: Slope (dimensionless)
R: Resistance (ohm)

Formula(s)

S . x a
m ¼
M S
o
! !
0:5
c l D AB
R ¼ m
c D
g AC
Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons,
Chapter: 22, Page: 691.

5.26 Determination of the diameter of a falling sphere

Input(s)
Re: Reynolds Number (dimensionless)
v: Velocity of Fluid (ft/s)
r: Density of Fluid (g/cc)
m: Viscocity of Fluid (cP)

Output(s)
D: Diameter (ft)

Formula(s)

Re m
D ¼
r v
Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons.
Chapter: 20, Page: 650.