The effects of particle properties, void fraction, and surface tension on the trickle-bubbly flow regime transition in trickle bed reactors

2016 ◽  
Vol 285 ◽  
pp. 402-408 ◽  
Author(s):  
Gregory S. Honda ◽  
Jorge H. Pazmiño ◽  
Eric Lehmann ◽  
Daniel A. Hickman ◽  
Arvind Varma
Keyword(s):  
Surface Tension ◽  
Flow Regime ◽  
Void Fraction ◽  
Bubbly Flow ◽  
Regime Transition ◽  
Particle Properties ◽  
Flow Regime Transition ◽  
Trickle Bed Reactors ◽  
Trickle Bed

Flow regime transition in trickle-bed reactors

1979 ◽  
Vol 18 (2) ◽  
pp. 173-182 ◽  
Author(s):  
S. Sicardi ◽  
H. Gerhard ◽  
H. Hoffmann
Keyword(s):  
Flow Regime ◽  
Regime Transition ◽  
Flow Regime Transition ◽  
Trickle Bed Reactors ◽  
Trickle Bed

Flow regime transition in trickle-bed reactors

1979 ◽  
Vol 18 (3) ◽  
pp. 173-182 ◽  
Author(s):  
S. Sicardi ◽  
H. Gerhard ◽  
H. Hoffmann
Keyword(s):  
Flow Regime ◽  
Regime Transition ◽  
Flow Regime Transition ◽  
Trickle Bed Reactors ◽  
Trickle Bed

Flow Regime Transition in a Trickle Bed Reactor

2005 ◽  
Vol 192 (8) ◽  
pp. 1046-1066 ◽  
Author(s):  
AJAY BANSAL ◽  
R. K. WANCHOO ◽  
S. K. SHARMA
Keyword(s):  
Flow Regime ◽  
Regime Transition ◽  
Trickle Bed Reactor ◽  
Flow Regime Transition ◽  
Trickle Bed

On flow regime transition in trickle bed: Development of a novel deep‐learning‐assisted image analysis method

AIChE Journal ◽  
2019 ◽  
Vol 66 (2) ◽  
Author(s):  
Chao Wang ◽  
Shaoshuo Li ◽  
Yao Yang ◽  
Zhengliang Huang ◽  
Jingyuan Sun ◽  
...  
Keyword(s):  
Image Analysis ◽  
Deep Learning ◽  
Flow Regime ◽  
Regime Transition ◽  
Analysis Method ◽  
Image Analysis Method ◽  
Flow Regime Transition ◽  
Trickle Bed

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.

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