Difference between revisions of "Griffith correlation"

Revision as of 17:02, 27 March 2017

The Griffith correlation ^[1] is an empirical correlation which defines:

The bubble flow exist when:

\frac{v_g}{v_g + v_L} < L_B

^[3]

L_B = 1.071 - 0.2218 \frac{(v_g+v_L)^2}{D}

, with the limit

L_B \geqslant 0.13

^[2]

The gas holdup:

H_g = \frac{1}{2}\ \left ( 1 + \frac{v_g+v_L}{v_s} - \sqrt{ \left ( 1 + \frac{v_g+v_L}{v_s} \right )^2 - 4 \frac{v_g}{v_s}} \right )

^[2]

Griffith correlation adds a hook to VLP curve calculated by Hagedorn and Brown.

D

= pipe diameter, ft

H_g

= gas holdup factor, dimensionless

L_B

= bubble-slug boundary, dimensionless

v_g

= gas velocity, ft/sec

v_L

= liquid velocity, ft/sec

v_s

= 0.8, slip velocity (difference between average gas and liquid velocities), ft/sec

↑ Griffith, P.; Wallis, G. B. (August 1961). "Two-Phase Slug Flow". Journal of Heat Transfer. ASME. 83: 307–320.
↑ ^2.0 ^2.1 ^2.2 ^2.3 Orkiszewski, J. (June 1967). "Predicting Two-Phase Pressure Drops in Vertical Pipe". Journal of Petroleum Technology. SPE. 19 (SPE-1546-PA).
↑ Economides, M.J.; Hill, A.D.; Economides, C.E.; Zhu, D. (2013). Petroleum Production Systems (2 ed.). Westford, Massachusetts: Prentice Hall. ISBN 978-0-13-703158-0.

@@ Line 17: / Line 17: @@
 == Discussion  ==
-[[Griffith correlation]] creates a hook at VLP curve calculated by [[Hagedorn and Brown]].
+[[Griffith correlation]] adds a hook to VLP curve calculated by [[Hagedorn and Brown]].
 == Nomenclature  ==