Forecasting a bubbly-intermittent flow regime transition in helically coiled tubes

2021 ◽  
Author(s):  
E. Meretskaya ◽  
D. Eskin
Keyword(s):  
Flow Regime ◽  
Intermittent Flow ◽  
Regime Transition ◽  
Flow Regime Transition

Fluid-Elastic Instability in Tube Bundles and Effect of Flow Regime Transition

2006 ◽  
Author(s):  
In-Cheol Chu ◽  
Heung June Chung ◽  
Young Jung Yun
Keyword(s):  
Flow Regime ◽  
Void Fraction ◽  
Tube Bundle ◽  
Damping Ratio ◽  
Intermittent Flow ◽  
Elastic Instability ◽  
Regime Transition ◽  
Two Phase ◽  
Flow Regime Transition ◽  
Tube Bundles

Fluid-elastic instability characteristics in an air-water two-phase cross-flow have been experimentally investigated using two different arrangements of cantilevered straight tube bundles. Rotated triangular array tube bundle is for the supplementary test of the existing work, and normal square array tube bundle is for the investigation of fluid-elastic instability in higher p/d condition. The present paper provides the experimental results of the tube vibration response, hydrodynamic mass, damping ratio, and fluid-elastic instability. As the two-phase gap velocity increased, the fluidic-elastic instability occurred in the lift direction and a strongly coupled tube motion was found. The damping ratio was very dependent on the void fraction, as in the previous works. For a low void fraction flow, the fluid-elastic instability could be predicted by using Connors’ equation. However, the fluid-elastic instability in a high void fraction flow was quite different. The transition between the two fluid-elastic instability regions almost coincided with the flow regime transition criteria from a continuous bubbly flow to an intermittent flow.

Low Bond Number Two-Phase Flow Regime Transition from Slug to Annular Wavy Flow in a Microchannel

2003 ◽  
Vol 125 (4) ◽  
pp. 544-544 ◽  
Author(s):  
Sang Young Son ◽  
Jeffrey S. Allen ◽  
Kenneth O. Kihm
Keyword(s):  
Flow Regime ◽  
Two Phase Flow ◽  
Bond Number ◽  
Phase Flow ◽  
Regime Transition ◽  
Two Phase ◽  
Flow Regime Transition

Influence of Operating Pressure on Gas Holdup and Flow Regime Transition in a Bubble Column

2010 ◽  
Vol 43 (10) ◽  
pp. 829-832 ◽  
Author(s):  
Hiroaki Matsubara ◽  
Kiyoshi Naito ◽  
Hideharu Kuwamoto ◽  
Toshiyuki Sakaguchi
Keyword(s):  
Flow Regime ◽  
Bubble Column ◽  
Gas Holdup ◽  
Operating Pressure ◽  
Regime Transition ◽  
Flow Regime Transition

scholarly journals Effect of viscosity on homogeneous–heterogeneous flow regime transition in bubble columns

2003 ◽  
Vol 96 (1-3) ◽  
pp. 15-22 ◽  
Author(s):  
M.C. Ruzicka ◽  
J. Drahoš ◽  
P.C. Mena ◽  
J.A. Teixeira
Keyword(s):  
Flow Regime ◽  
Bubble Columns ◽  
Regime Transition ◽  
Heterogeneous Flow ◽  
Flow Regime Transition

Prediction of Flow-Regime Transition over a Stepped Channel

2019 ◽  
Vol 145 (7) ◽  
pp. 06019004 ◽  
Author(s):  
Weichen Ren ◽  
Jianhua Wu ◽  
Fei Ma ◽  
Yu Zhou
Keyword(s):  
Flow Regime ◽  
Regime Transition ◽  
Flow Regime Transition

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
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