Interaction of weak shocks in drift-flux model of compressible two-phase flows

2018 ◽  
Vol 107 ◽  
pp. 222-227 ◽  
Author(s):  
S. Kuila ◽  
T. Raja Sekhar
Keyword(s):  
Two Phase Flows ◽  
Two Phase ◽  
Drift Flux Model ◽  
Drift Flux ◽  
Flux Model ◽  
Weak Shocks

A New Multidimensional Drift Flux Mixture Model for Gas–Liquid Droplet Two-Phase Flow

2015 ◽  
Vol 12 (04) ◽  
pp. 1540001 ◽  
Author(s):  
Zhi Shang ◽  
Jing Lou ◽  
Hongying Li
Keyword(s):  
Mixture Model ◽  
Liquid Droplet ◽  
Diffusion Flux ◽  
Water Mist ◽  
Liquid Droplets ◽  
Two Phase Flows ◽  
Two Phase ◽  
Drift Flux Model ◽  
Drift Flux ◽  
Flux Model

A new multidimensional drift flux mixture model was developed to simulate gas–liquid droplet two-phase flows. The new drift flux model was modified by considering the centrifugal force on the liquid-droplets. Therefore the traditional 1D drift flux model was upgraded to multidimension, 2D and 3D. The slip velocities between the continual phase (gas) and the dispersed phase (liquid droplets) were able to calculate through the multidimensional diffusion flux velocities based on the new modified drift flux model. Through the numerical simulations comparing with the experiments and the simulations of other models on the backward-facing step and the water mist spray two-phase flows, the new model was validated.

Stability Analysis of Two-Phase Flows in Pipe-Riser Systems

2000 ◽  
Author(s):  
Erich Zakarian
Keyword(s):  
Hydrodynamic Instability ◽  
Momentum Balance ◽  
Quasi Equilibrium ◽  
Two Phase Flows ◽  
Two Phase ◽  
Drift Flux Model ◽  
Drift Flux ◽  
Differential Algebraic System ◽  
Flux Model ◽  
Liquid Flows

A differential-algebraic system is presented to model unstable two-phase flows in pipe-riser systems. Equations derive from the space integration of an isothermal drift-flux model assuming quasi-equilibrium momentum balance. A linear analysis of this system gives a new stability criterion for gas-liquid flows in pipe-riser systems. This criterion is validated by laboratory experiments. Then, a nonlinear analysis shows that the severe slugging phenomenon is a hydrodynamic instability coming from a supercritical Hopf bifurcation.

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