Magneto-hydrodynamics of bubbly flow in horizontal pipe: New criteria through numerical simulation

AbstractBubbly flow still represents a challenge for large-scale numerical simulation. Among many others, the understanding and modelling of bubble-induced turbulence (BIT) are far from being satisfactory even though continuous efforts have been made. In particular, the buoyancy of the bubbles generally introduces turbulence anisotropy in the flow, which cannot be captured by the standard eddy viscosity models with specific source terms representing BIT. Recently, on the basis of bubble-resolving direct numerical simulation data, a new Reynolds-stress model considering BIT was developed by Ma et al. (J Fluid Mech, 883: A9 (2020)) within the Euler—Euler framework. The objective of the present work is to assess this model and compare its performance with other standard Reynolds-stress models using a systematic test strategy. We select the experimental data in the BIT-dominated range and find that the new model leads to major improvements in the prediction of full Reynolds-stress components.

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Numerical Simulation of Microparticles Motion in Two-Phase Bubbly Flow

10.1115/1.0000372v ◽

2021 ◽

Author(s):

Hiroyuki Yoshida ◽

Shinichiro Uesawa

Keyword(s):

Numerical Simulation ◽

Bubbly Flow ◽

Two Phase

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Combination of Bubbly Flow Model and Cavity Source Model for the Practical Numerical Simulation of Cavitating Flows

Proceedings of the 8th International Symposium on Cavitation ◽

10.3850/978-981-07-2826-7_251 ◽

2012 ◽

Author(s):

Takeo Kajishima ◽

Koji Marutani

Keyword(s):

Numerical Simulation ◽

Flow Model ◽

Bubbly Flow ◽

Source Model ◽

Cavitating Flows

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Experimental Visualization and Numerical Simulation of Liquid-Gas Two-Phase Flows in a Horizontal Pipe

Volume 7: Fluids Engineering ◽

10.1115/imece2017-72113 ◽

2017 ◽

Cited By ~ 1

Author(s):

Milad Darzi ◽

Chanwoo Park

Keyword(s):

Numerical Simulation ◽

Gas Flow ◽

Cfd Simulation ◽

Glass Tube ◽

Flow Patterns ◽

Two Phase Flows ◽

Two Phase ◽

Mixture Flow ◽

Horizontal Pipe ◽

Flow Rates

This paper presents the results of both visualization experiment and numerical simulation for two-phase (water-air mixture) flows in a horizontal tube. A visualization experimental setup was used to observe various two-phase flow patterns for different flow rates of water/air mixture flow in a glass tube of 12 mm in diameter. Total of 303 experimental data points were compared with Mandhane’s flow map. Most of the data for stratified, plug and slug flows were found to be in good agreement. However, annular flow was observed for relatively lower gas flow rates and also wavy flow occurred at relatively higher liquid flow rates in this experiment. A three-dimensional Computational Fluid Dynamics (CFD) simulation was performed using OpenFOAM employing “interFoam” as the solver to simulate the two-phase flows in horizontal pipe based on Volume-Of-Fluid (VOF) method. The simulated and experimentally observed flow patterns for the same set of superficial velocities shows acceptable similarities for stratified, wavy, plug, slug and annular flows. Also, the computed values of the void fraction and pressure drop for the numerical simulations shows reasonable agreement with well-known correlations in literature.

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