One-Dimensional Drift-Flux Model and Constitutive Equations for Relative Motion Between Phases in Various Two-Phase Flow Regimes at Microgravity Conditions

In view of the practical importance of the drift-flux model for two-phase flow analyses at microgravity conditions, the constitutive equations for distribution parameter and drift velocity have been developed for various two-phase flow regimes at microgravity conditions. A comparison of the model with various experimental data over various flow regimes and a wide range of flow parameters taken at microgravity conditions shows a satisfactory agreement. The newly developed drift-flux model has been applied to reduced gravity conditions such as 1.62 and 3.71 cm/s2, which correspond to the Lunar and Martian surface gravities, respectively, and the effect of the gravity on the void fraction in two-phase flow systems has been discussed.

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One-dimensional drift-flux model and constitutive equations for relative motion between phases in various two-phase flow regimes

10.2172/6871478 ◽

1977 ◽

Cited By ~ 325

Author(s):

M. Ishii

Keyword(s):

Relative Motion ◽

Constitutive Equations ◽

Two Phase Flow ◽

Flow Regimes ◽

Phase Flow ◽

Two Phase ◽

One Dimensional ◽

Drift Flux Model ◽

Drift Flux ◽

Flux Model

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One-dimensional drift-flux model and constitutive equations for relative motion between phases in various two-phase flow regimes

International Journal of Heat and Mass Transfer ◽

10.1016/s0017-9310(03)00322-3 ◽

2003 ◽

Vol 46 (25) ◽

pp. 4935-4948 ◽

Cited By ~ 130

Author(s):

Takashi Hibiki ◽

Mamoru Ishii

Keyword(s):

Relative Motion ◽

Constitutive Equations ◽

Two Phase Flow ◽

Flow Regimes ◽

Phase Flow ◽

Two Phase ◽

One Dimensional ◽

Drift Flux Model ◽

Drift Flux ◽

Flux Model

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Investigation of the Structure Velocity in a 3x3 Rod Bundle Under Bubbly and Cap-Bubbly Flow Regimes

Volume 3: Student Paper Competition; Thermal-Hydraulics; Verification and Validation ◽

10.1115/icone2020-16946 ◽

2020 ◽

Author(s):

Pei-Syuan Ruan ◽

Shao-Wen Chen ◽

Min-Song Lin ◽

Jin-Der Lee ◽

Jong-Rong Wang

Keyword(s):

Two Phase Flow ◽

Bubbly Flow ◽

Flow Regimes ◽

Phase Flow ◽

Two Phase ◽

Drift Flux Model ◽

Drift Flux ◽

Rod Bundle ◽

Flux Model ◽

Sudden Jump

Abstract This paper presents the experimental results and analyses of the structure velocity of air-water two-phase flow in a 3 × 3 rod bundle channel. A total of 56 flow conditions were tested and investigated for rod-gap, sub-channel, rod-wall and global regions of rod bundle geometry. The experimental tests were carried out under bubbly and cap-bubbly flow regimes with superficial gas and liquid velocities of 0–1 m/s and 1–1.7 m/s, respectively. The conductivity probes were set at different heights to measure the global and local void fractions. The structure velocity of air-water two-phase flow is the average bubble velocity calculated by the method in this study. The structure velocity were determined by utilizing the cross-correlation technique to analyze the time lags of the bubbles passing through the conductivity probes. The results of this study indicated that the structure velocity may increase with increasing superficial gas and liquid velocities. In low superficial gas velocity region, the structure velocity may first slightly increase and follow by a sudden jump which appear in most regions. After the sudden jump, the structure velocity may keep increasing mildly. The present structure velocities have been compared with the area-averaged gas velocities predicted by the drift flux model, and it appears that most structure velocities show a good agreement with the averaged gas velocities from the drift flux model after the jump.

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A flow pattern independent drift flux model based void fraction correlation for a wide range of gas–liquid two phase flow

International Journal of Multiphase Flow ◽

10.1016/j.ijmultiphaseflow.2013.11.001 ◽

2014 ◽

Vol 59 ◽

pp. 186-205 ◽

Cited By ~ 98

Author(s):

Swanand M. Bhagwat ◽

Afshin J. Ghajar

Keyword(s):

Flow Pattern ◽

Void Fraction ◽

Two Phase Flow ◽

Phase Flow ◽

Two Phase ◽

Drift Flux Model ◽

Model Based ◽

Drift Flux ◽

Wide Range ◽

Flux Model

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Formulation of a fully implicit numerical scheme for simulation of two-phase flow in a vertical channel using the Drift-Flux Model

Progress in Nuclear Energy ◽

10.1016/j.pnucene.2017.11.009 ◽

2018 ◽

Vol 103 ◽

pp. 91-105 ◽

Cited By ~ 2

Author(s):

A. Hajizadeh ◽

H. Kazeminejad ◽

S. Talebi

Keyword(s):

Numerical Scheme ◽

Two Phase Flow ◽

Vertical Channel ◽

Phase Flow ◽

Two Phase ◽

Drift Flux Model ◽

Drift Flux ◽

Fully Implicit ◽

Flux Model

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Interfacial Structures and Regime Transition in Co-Current Downward Bubbly Flow

Journal of Fluids Engineering ◽

10.1115/1.1777229 ◽

2004 ◽

Vol 126 (4) ◽

pp. 528-538 ◽

Cited By ~ 15

Author(s):

S. Kim ◽

S. S. Paranjape ◽

M. Ishii ◽

J. Kelly

Keyword(s):

Two Phase Flow ◽

Bubbly Flow ◽

Superficial Velocity ◽

Phase Flow ◽

Two Phase ◽

Drift Flux Model ◽

Drift Flux ◽

Flow Parameters ◽

Interfacial Structures ◽

Flux Model

The vertical co-current downward air-water two-phase flow was studied under adiabatic condition in round tube test sections of 25.4-mm and 50.8-mm ID. In flow regime identification, a new approach was employed to minimize the subjective judgment. It was found that the flow regimes in the co-current downward flow strongly depend on the channel size. In addition, various local two-phase flow parameters were acquired by the multi-sensor miniaturized conductivity probe in bubbly flow. Furthermore, the area-averaged data acquired by the impedance void meter were analyzed using the drift flux model. Three different distributions parameters were developed for different ranges of non-dimensional superficial velocity, defined by the ration of total superficial velocity to the drift velocity.

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