Page 287 - Formulas and Calculations for Petroleum Engineering

280 Formulas and calculations for petroleum engineering

M B : Molar Weight (g/g mol)
m: Viscosity (cP)
3
V A : Molar Volume (cm /g mol)

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

Formula(s)

0:5
ø ð B* M Þ T
B
D ¼ 0:000000074
AB 0:6
m V
A
Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons,
Chapter: 17, Page: 530.

5.52 Estimation of self diffusivity at high density
Input(s)

3
a: Concentration (g mol/cm )
Daa: Prediction of Self-Diffusivity (g mol/cm s)
cDaa r : Reduced Diffusivity (g mol/cm s)

Output(s)

cDaa c : Critical Diffusivity (g mol/cm s)
CDaa: Prediction of Self-Diffusivity (g mol/cm s)

Formula(s)

c Daa
cDaa ¼
c
cDaa
r
ð
ð
CDaa ¼ cDaa Þ cDaa Þ
c r
Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons,
Chapter: 17, Page: 523.

5.53 Estimation of the viscosity of a pure liquid
Input(s)

N: Avogadro Number (g/mol)
2
h: Planck Constant (g cm /s)
3
V: Volume of a Mole of Liquid (cm /g mol)
T b : Boiling Point (Centigrade)
T: Ambient Temperature (Celsius)

Output(s)

m: Viscosity of a Pure Liquid (g/(cm s))