Difference between revisions of "Griffith correlation"

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== Nomenclature  ==
 
== Nomenclature  ==
 
== References ==
 
== References ==
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<references>
 +
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<ref name= Griffith>{{cite journal
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|last1= Griffith |first1=P.
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|last2= Wallis |first2=G. B.
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|title=Two-Phase Slug Flow
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|journal=J. Heat Transfer
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|date=August 1961
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|volume=17(04)
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|pages=307-320
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}}</ref>
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</references>
  
 
[[Category:pengtools]]
 
[[Category:pengtools]]
 
[[Category:pqPlot]]
 
[[Category:pqPlot]]

Revision as of 16:33, 27 March 2017

Brief

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

  • The boundary between the bubble and slug flow
  • The void fraction of gas in bubble flow - gas hold up Hg

Math & Physics

The bubble flow exist when:

\frac{q_g}{q_g + q_L} < L_B [2]
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]

Discussion

Nomenclature

References

  1. ↑ Griffith, P.; Wallis, G. B. (August 1961). "Two-Phase Slug Flow". J. Heat Transfer. 17(04): 307–320. 
  2. ↑ 2.0 2.1 2.2 Cite error: Invalid <ref> tag; no text was provided for refs named Orkiszewski
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