C.3.3B Viscosity - GE PanaFlow MV80 User Manual

Appendix C. Flowmeter Calculations

C.3.3b Viscosity

The liquid viscosity is found by Andrade's equation. This uses two viscosities at different temperatures to extrapolate
the viscosity.
Andrade's equation:
To find A and B:
and
The temperatures are all in degrees Rankin. Do not misinterpret the subscript R to mean that they are reduced
temperatures.
142
B
L
μ
A exp ------------ -
=
L
T
degR
In μ (
T T
degR1 degR2
B ------------------------------------------------------------- -
=
L
T T
–
degR2 degR1
μ
1
----------------------------------------- -
A
=
L
( ⁄
exp B T
L degR1
⁄ μ )
1 2
)
PanaFlow™ MV80 & MV82 User's Manual