Numerical simulation of multiphase flows using an enhanced Volume-of-Fluid (VOF) method

Garoosi, Faroogh; Hooman, Kamel

doi:10.1016/j.ijmecsci.2021.106956

Cited by 39 publications

(17 citation statements)

References 93 publications

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“…Since this method is one of the multiphase models, the phase should be defined. Usually, the phase that occupies the largest amount of the total volume is set as the primary phase and the phase that occupies the next largest volume is set as the secondary phase [ 30 ]. Table 2 summarizes the conditions used in the simulation.…”

Section: Methodsmentioning

confidence: 99%

Numerical Investigation of Overtopping Prevention for Optimal Safety Dike Design

Son

Kim

Min

et al. 2022

IJERPH

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Leakage accidents at chemical facilities have a negative impact on both the environment and human life, and the government has established and implemented regulations on dikes in order to minimize such accidents. However, the overtopping phenomenon in which chemicals overflow the dike due to catastrophic leakage requires additional safeguards. In this study, the mitigation effect was confirmed by simulating tanks and dikes using various deflector plates to minimize the effect of spilled chemicals. ANSYS Fluent 19.1, a computational fluid dynamics program, was used, and the overtopping effect was compared with a dike design that satisfies the safety regulations using a volume of fluid (VOF) model that analyzes multiphase flow through a surface tracking technique. Nitric acid and sulfuric acid were used in the study; they were selected because they are frequently involved in leakage accidents. In the event of a leak in a liquid tank, a dike with a deflector plate was very effective in reducing overtopping, and a deflector at a 45° angle was more effective than a 30° deflector. However, it is necessary to install additional safeguards at the joint between the dike and the deflection plate to withstand the force of the liquid.

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Section: Methodsmentioning

confidence: 99%

Numerical Investigation of Overtopping Prevention for Optimal Safety Dike Design

Son

Kim

Min

et al. 2022

IJERPH

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“…The VOF model is applied to capture the interface of the gas-liquid phase. 24 The control equation, including the continuity equation, the momentum equation, and the volume fraction equation, are given, respectively, as follows:…”

Section: Hydrodynamics Simulationmentioning

confidence: 99%

“…The finite volume commercial CFD software package Fluent is used to simulate the Taylor unit in the microchannel. The VOF model is applied to capture the interface of the gas–liquid phase 24 . The control equation, including the continuity equation, the momentum equation, and the volume fraction equation, are given, respectively, as follows:

\frac{\partial \rho }{\partial t}=\nabla \cdot (\rho \vec{u})=0,

\frac{\partial (\rho \vec{u})}{\partial t}+\nabla \cdot (\rho \vec{u}\vec{u})=-\nabla p+\mu {\nabla }^{2}\vec{u}+\rho \vec{g}+\vec{F},

\frac{\partial {\alpha }_{i}}{\partial t}+\vec{u}\cdot \nabla {\alpha }_{i}=0,

where ρ represents the density,

\vec{u}

represents the velocity vector, p is the pressure, and

\vec{F}

is the external body force.…”

Section: Mathematical Modelmentioning

confidence: 99%

Numerical investigation of mass transfer behavior of a gas–liquid two‐phase Taylor flow in a microchannel by a volume‐of‐fluid multiphase flow system

Zhong

Jiao

Nie

et al. 2022

Int Journal of Mech Sys Dyn

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The microchannel reactor is the most commonly used microreaction technology, an innovative reaction system developed in recent years. This study investigates the mass transfer behavior of a gas-liquid two-phase Taylor flow in a microchannel by coupling the volume-of-fluid model and the species transport model. The concentration distribution and the volumetric mass transfer coefficient of the gas solute are determined and discussed in detail. The simulation results reveal that the

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“…However, these methods may introduce additional errors that can compromise accuracy and robustness. For instance, the VOF method requires reconstruction methods to calculate the surface tension [8], and the LS method is characterized by a violation of local mass conservation [9].…”

Section: Introductionmentioning

confidence: 99%

A GPU-Based δ-Plus-SPH Model for Non-Newtonian Multiphase Flows

Shi

Huang

2022

Water

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A multiphase extension of the δ-plus-SPH (smoothed particle hydrodynamics) model is developed for modeling non-Newtonian multiphase flow. A modified numerical diffusive term and special shifting treatment near the phase interface are introduced to the original δ-plus-SPH model to improve the accuracy and numerical stability of the weakly incompressible SPH model. The Herschel–Bulkley model is used to describe non-Newtonian fluids. A sub-particle term is added in the momentum equation based on a large eddy simulation. The graphic processing unit (GPU) acceleration technique is applied to increase the computational efficiency. Three test cases including, a static tank, Poiseuille flow, and submarine debris flow, are presented to assess the performance of the new multiphase SPH model. Comparisons with analytical solutions, experimental data, and previous numerical results indicate that the proposed SPH model can capture highly transient incompressible two-phase flows with consistent pressure across the interface.

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Numerical simulation of multiphase flows using an enhanced Volume-of-Fluid (VOF) method

Cited by 39 publications

References 93 publications

Numerical Investigation of Overtopping Prevention for Optimal Safety Dike Design

Numerical Investigation of Overtopping Prevention for Optimal Safety Dike Design

Numerical investigation of mass transfer behavior of a gas–liquid two‐phase Taylor flow in a microchannel by a volume‐of‐fluid multiphase flow system

A GPU-Based δ-Plus-SPH Model for Non-Newtonian Multiphase Flows

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