Paper Information

Journal:   MODARES MECHANICAL ENGINEERING   JULY 2017 , Volume 17 , Number 4 #P0099; Page(s) 177 To 187.
 
Paper: 

NUMERICAL MODELING OF AIR BUBBLES ENTRAINMENT IN LIQUID SLUG BODY AT HORIZAONTAL DUCT

 
 
Author(s):  ZEYNALABEDINI MOSTAFA, ANSARI MOHAMMAD REZA*
 
* DEPARTMENT OF MECHANICAL ENGINEERING, TARBIAT MODARES UNIVERSITY., TEHRAN, IRAN
 
Abstract: 

Analysis of air bubbles entrainment in liquid slug body is one of the most important and complicated phenomena during slug flow regime. In the present attempt, a method is proposed for slug modeling to consider the air bubble entrainment into slug liquid body. The effect of consequences and their impact on slug behaviour to predict more accurate correlations for slug parameters is estimated and calculated.
A two-fluid single pressure model is considered that is combined with population balance model for equal bubble diameter series and is solved using volume of fluid. In this regard, based on slug and hydraulic jump similarity, a correlation for air bubble entrainment rate and its mechanism is selected.
This correlation is developed in the form of a user defined function code and is coupled with other models in FLUENT solver to calculate slug flow. Finally, the result of this numerical modeling is validated with the result of other numerical and experimental results in the related literature. The result is consist with the slug flow profile, entrained air bubble profile and their diameter distribution, slug mixture velocity, etc.

 
Keyword(s): SLUG, ENTRAINMENT, BUBBLE, COUPLED MODEL, SIMULATION
 
References: 
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