Two-phase flow regime map predictions under microgravity

AIChE Journal ◽  
1988 ◽  
Vol 34 (1) ◽  
pp. 137-139 ◽  
Author(s):  
S. B. Reddy Karri ◽  
V. K. Mathur
Keyword(s):  
Flow Regime ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Regime Map ◽  
Flow Regime Map

Study of Interfacial Structures: Bubbly Flow in 1.27 cm Diameter Pipe

2002 ◽  
Author(s):  
S. Paranjape ◽  
S. Kim ◽  
M. Ishii ◽  
J. Uhle
Keyword(s):  
Flow Regime ◽  
Two Phase Flow ◽  
Bubbly Flow ◽  
Bubble Velocity ◽  
Phase Flow ◽  
Two Phase ◽  
Interfacial Structures ◽  
Radial Profiles ◽  
Regime Map ◽  
Flow Regime Map

The objective of the present research is to study the flow regime map, the detailed interfacial structures, and the bubble transport in an adiabatic air-water two-phase flow mixture, flowing upward through a vertical round pipe having 1.27 cm. inner diameter. The flow regime map is obtained by processing the characteristic signals acquired from an impedance void meter, using a self-organized neural network. The local two-phase flow parameters are measured by the state-of-the-art four-sensor conductivity probe at three axial locations in the pipe. The measured local parameters include void fraction (α), interfacial area concentration (ai), bubble frequency (fb), bubble velocity (Ub) and bubble Sauter mean diameter (Dsm). The radial profiles of these parameters and their development along the axial direction reveals the structure of the two phase mixture and the bubble interaction mechanisms.

scholarly journals Some problems of hydrodynamics of two-phase flow mixtures in minichannels

2014 ◽  
Vol 35 (2) ◽  
pp. 93-101
Author(s):  
Monika Wengel ◽  
Barbara Miłaszewicz ◽  
Roman Ulbrich
Keyword(s):  
Two Phase Flow ◽  
Early Stage ◽  
Phase Flow ◽  
Test Results ◽  
Two Phase ◽  
Key Issues ◽  
Gas Liquid Flow ◽  
Regime Map ◽  
Flow Regime Map

Abstract Gas-liquid two-phase flow in minichannels has been the subject of increased research interest in the past few years. Evaluation, however, of today’s state of the art regarding hydrodynamics of flow in minichannels shows significant differences between existing test results. In the literature there is no clear information regarding: defining the boundary between minichannels and conventional channels, labelling of flow patterns. The review of literature on the hydrodynamics of gas-liquid flow in minichannels shows that, despite the fact that many research works have been published, the problem of determining the effect of diameter of the minichannel on the hydrodynamics of the flow is still at an early stage. Therefore, the paperpresents the results of research concerning determination of flow regime map for the vertical upward flow in minichannels. The research is based on a comprehensive analysis of the literature data and on the research that has been carried out. Such approach to the mentioned above problems concerning key issues of the two-phase flow in minichannels allowed to determine ranges of occurrence of flow structures with a relatively high accuracy.

Electrohydrodynamic atomization two-phase flow regime map for liquid hydrocarbon under pulsed electric fields with co-gas flow

2008 ◽  
Vol 66 (1-2) ◽  
pp. 94-98 ◽  
Author(s):  
J.S. Chang ◽  
C. Ayrault ◽  
D. Brocilo ◽  
D. Ewing ◽  
G.D. Harvel ◽  
...  
Keyword(s):  
Flow Regime ◽  
Electric Fields ◽  
Gas Flow ◽  
Pulsed Electric Fields ◽  
Liquid Hydrocarbon ◽  
Phase Flow ◽  
Two Phase ◽  
Regime Map ◽  
Flow Regime Map ◽  
Co Gas

On Instabilities in Horizontal Two-Phase Flow

1994 ◽  
Vol 59 (12) ◽  
pp. 2595-2603
Author(s):  
Lothar Ebner ◽  
Marie Fialová
Keyword(s):  
Differential Equation ◽  
Flow Regime ◽  
Slug Flow ◽  
Annular Flow ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Annular Flows ◽  
Flow Regime Maps

Two regions of instabilities in horizontal two-phase flow were detected. The first was found in the transition from slug to annular flow, the second between stratified and slug flow. The existence of oscillations between the slug and annular flows can explain the differences in the limitation of the slug flow in flow regime maps proposed by different authors. Coexistence of these two regimes is similar to bistable behaviour of some differential equation solutions.

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
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