Experimental study of vertical co-current slug flow in terms of flow regime transition in relatively small diameter tubes

2018 ◽  
Vol 108 ◽  
pp. 140-155 ◽  
Author(s):  
Muhao Zhang ◽  
Liang-ming Pan ◽  
Hui He ◽  
Xiaohong Yang ◽  
Mamoru Ishii
Keyword(s):  
Experimental Study ◽  
Flow Regime ◽  
Slug Flow ◽  
Small Diameter ◽  
Regime Transition ◽  
Flow Regime Transition

Cap bubbly-to-slug flow regime transition in a vertical annulus

2004 ◽  
Vol 37 (3) ◽  
pp. 458-464 ◽  
Author(s):  
X. Sun ◽  
S. Kuran ◽  
M. Ishii
Keyword(s):  
Flow Regime ◽  
Slug Flow ◽  
Regime Transition ◽  
Flow Regime Transition ◽  
Vertical Annulus

3518 An experimental study on void fluctuation and flow regime transition in gas-liquid two-phase flow

2005 ◽  
Vol 2005.3 (0) ◽  
pp. 193-194
Author(s):  
Takayuki FUJITA ◽  
Tomio OKAWA ◽  
Isao KATAOKA
Keyword(s):  
Experimental Study ◽  
Flow Regime ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Regime Transition ◽  
Two Phase ◽  
Flow Regime Transition

The mechanism of bubbly to slug flow regime transition in air-water two phase flow: A new transition criterion

2017 ◽  
Vol 108 ◽  
pp. 1579-1590 ◽  
Author(s):  
Muhao Zhang ◽  
Liang-ming Pan ◽  
Peng Ju ◽  
Xiaohong Yang ◽  
Mamoru Ishii
Keyword(s):  
Flow Regime ◽  
Slug Flow ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Regime Transition ◽  
Two Phase ◽  
Flow Regime Transition ◽  
Transition Criterion

Investigation of Slug Flow Structure in Terms of Flow Regime Transition in Co-Current Two-Phase Flow

2017 ◽  
Author(s):  
Muhao Zhang ◽  
Liang-ming PAN ◽  
Peng Ju ◽  
Mamoru Ishii
Keyword(s):  
Turbulent Flow ◽  
Flow Regime ◽  
Void Fraction ◽  
Slug Flow ◽  
Transition Process ◽  
Phase Flow ◽  
Regime Transition ◽  
Two Phase ◽  
Flow Regime Transition ◽  
Wake Effects

In order to investigate the structure parameters evolution characteristics during flow regime transition process in slug flow, the vertical upward slug flow experiment in a wide range of liquid superficial velocity (0.03 < jl < 1.6 m/s) were conducted in a tubular test section with the inside diameter of 25.4 mm. Impedance void meters were employed to measure the void fraction of separated two parts corresponding to Taylor bubble and liquid slug. The present research studied the evolution of length ratio and void fraction in slug unit by keeping the liquid superficial velocity constant while increasing gas flow rate. New structure of slug unit in strong relation with transition process was observed. In specific, it was realized that the proportion of such special structure unit played an important role in transition from slug flow to churn-turbulent flow. The existing transition criteria from slug flow to churn-turbulent flow in upward two-phase flow (entrance effects model, flooding model, wake effects model, bubble coalescence model and Helmholtz instability model) were compared with the experimental identified results obtained by a new objective flow regime identification method, ReliefF-FCM algorithm. The results indicate that the transition model based on the wake effects could be the most appropriate choice to describe the mechanism of transition from slug flow to churn-turbulent flow in present experimental conditions.

A CONTRIBUTION TO THE MATHEMATICAL MODELING OF BUBBLY/SLUG FLOW REGIME TRANSITION

1991 ◽  
Vol 102 (1) ◽  
pp. 69-85 ◽  
Author(s):  
S. NAVARRO-VALENTI ◽  
A. CLAUSSE ◽  
D.A. DREW ◽  
R.T. LAHEY
Keyword(s):  
Mathematical Modeling ◽  
Flow Regime ◽  
Slug Flow ◽  
Regime Transition ◽  
Flow Regime Transition

Microgravity Bubbly-to-Slug Flow Regime Transition Theory and Modeling

2013 ◽  
Vol 25 (3) ◽  
pp. 161-177 ◽  
Author(s):  
Adam M. Shephard ◽  
Cable Kurwitz ◽  
Frederick R. Best
Keyword(s):  
Flow Regime ◽  
Slug Flow ◽  
Transition Theory ◽  
Regime Transition ◽  
Flow Regime Transition ◽  
Theory And Modeling

Analysis of the bubbly/slug flow regime transition

1994 ◽  
Vol 151 (1) ◽  
pp. 15-39 ◽  
Author(s):  
S. Kalkach-Navarro ◽  
R.T. Lahey ◽  
D.A. Drew
Keyword(s):  
Flow Regime ◽  
Slug Flow ◽  
Regime Transition ◽  
Flow Regime Transition
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