A two-phase flow model coupling with volume of fluid and immersed boundary methods for free surface and moving structure problems

Zhang, Cheng; Zhang, Wei; Lin, Nansheng; Tang, Youhong; Zhao, Chengtian; Gu, Jian; Wang, Lin; Chen, Xiaoming; Qiu, Ang

doi:10.1016/j.oceaneng.2013.09.010

Cited by 16 publications

(7 citation statements)

References 39 publications

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“…In the model, a single set of momentum equations is shared by the fluids, and the volume fraction of each fluid in each computational cell is tracked throughout the domain. By solving the governing equations, the phasic volume fraction, a concept describing the volume fraction of gas and liquid, can be determined [25]. The governing equations of the two-phase flow are given as:…”

Section: Governing Equationsmentioning

confidence: 99%

CFD Modeling on Hydrodynamic Characteristics of Multiphase Counter-Current Flow in a Structured Packed Bed for Post-Combustion CO2 Capture

et al. 2018

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Solvent-based post combustion CO2 capture is a promising technology for industrial application. Gas-liquid interfaces and interactions in the packed bed are considered one of the key factors affecting the overall CO2 absorption rate. Understanding the hydrodynamic characterizations within packed beds is essential to identify the appropriate enhanced mass transfer technique. However, multiphase counter-current flows in the structured packing typically used in these processes are complicated to visualize and optimize experimentally. In this paper, we aim to develop a comprehensive 3D multiphase, counter-current flow model to study the liquid/gas behavior on the surface of structured packing. The output from computational fluid dynamics (CFD) clearly visualized the hydrodynamic characterizations, such as the liquid distributions, wettability, and film thicknesses, in the confined packed bed. When the liquid We (Weber number) was greater than 2.21, the channel flow became insignificant and flow streams became more disorganized with more droplets at larger sizes. The portion of dead zones is decreased at higher liquid We, but it cannot be completely eliminated. Average film thickness was about 0.6–0.7 mm, however, its height varied significantly.

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Section: Governing Equationsmentioning

confidence: 99%

CFD Modeling on Hydrodynamic Characteristics of Multiphase Counter-Current Flow in a Structured Packed Bed for Post-Combustion CO2 Capture

et al. 2018

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“…Single-phase immersed boundary studies are reviewed in Mittal and Iaccarino (2005); Sotiropoulos and Yang (2014); Griffith and Patankar (2020). The method has also been used to impose solid boundary conditions in multiphase flow where the flow is modeled using interface-capturing methods (Shen and Chan, 2008Zhang et al, 2013Zhang et al, , 2014Gsell et al, 2016;Yang and Stern, 2009;Son, 2005;Arienti and Sussman, 2014;Patel et al, 2017;Washino et al, 2011;Sun and Sakai, 2015;Suh and Son, 2009;Horgue et al, 2014;Vincent et al, 2011). The use of interface-capturing methods allows for the solid boundary to be accounted for using the same methods as single-phase IB.…”

Section: Introductionmentioning

confidence: 99%

“…The use of interface-capturing methods allows for the solid boundary to be accounted for using the same methods as single-phase IB. Applications of IB with interface-capturing include wave propagation (Shen and Chan, 2008Zhang et al, 2013Zhang et al, , 2014Gsell et al, 2016;Yang and Stern, 2009), injectors (Suh and Son, 2009;Arienti and Sussman, 2014), porous media (Patel et al, 2017), hydroplaning (Vincent et al, 2011) and capillary flow (Horgue et al, 2014). The use of interface-capturing methods severely limit the flow regimes that can be modeled since every interface in the domain is resolved.…”

Section: Introductionmentioning

confidence: 99%

Diffuse-interface blended method for the imposition of physical boundaries in two-fluid flows

Treeratanaphitak,

Abukhdeir

2021

Preprint

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Multiphase flows are commonly found in chemical engineering processes such as distillation columns, bubble columns, fluidized beds and heat exchangers. Physical boundaries in numerical simulations of multiphase flows are generally defined by a mesh that conforms to the physical boundaries of the system. Depending on the complexity of the physical system, generating the conformal mesh can be time-consuming and the resulting mesh could potentially contain a large number of skewed elements, which is undesirable. The diffuse-interface approach allows for a structured mesh to be used while still capturing the desired solid-fluid boundaries. In this work, a diffuse-interface method for the imposition of physical boundaries is developed for two-fluid incompressible flow systems. The diffuse-interface is used to define the physical boundaries and the boundary conditions are imposed by blending the conservation equations from the twofluid model with that of the solid. The results from the diffuse-interface method and mesh-defined boundaries are found to be in good agreement at small diffuse-interface widths.

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“…In this type of configuration, the water/air interface does not cross the water/body interface. More recently, physical configurations involving partially immersed bodies (water entry of a sphere and dam break with an obstacle) have been investigated by Zhang et al [38] and Zhao et al [39] .…”

Section: Introductionmentioning

confidence: 99%

A coupled volume-of-fluid/immersed-boundary method for the study of propagating waves over complex-shaped bottom: Application to the solitary wave

Gsell¹,

Bonometti²,

Astruc³

2016

Computers & Fluids

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International audienceWe report about a numerical approach based on the direct numerical simulation of the Navier–Stokes equations for the study of wave-bottom interaction problems. A Volume of Fluid (VOF) method is coupled with an Immersed Boundary Method (IBM) and applied to the simulation of propagating waves over complex shaped bottoms. We first investigate the flow induced by a solitary wave over generic bottoms (i.e. a semi-circular cylinder and a sloping beach). We show that the method is able to describe various important features of wave-bottom interactions, including flow separation, vortex shedding and wave breaking, while keeping a reasonable computational effort. Then we demonstrate the capability of the present approach to model arbitrary shaped bottoms by simulating the run-up of a breaking solitary wave over a natural beach profile

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A two-phase flow model coupling with volume of fluid and immersed boundary methods for free surface and moving structure problems

Cited by 16 publications

References 39 publications

CFD Modeling on Hydrodynamic Characteristics of Multiphase Counter-Current Flow in a Structured Packed Bed for Post-Combustion CO2 Capture

CFD Modeling on Hydrodynamic Characteristics of Multiphase Counter-Current Flow in a Structured Packed Bed for Post-Combustion CO2 Capture

Diffuse-interface blended method for the imposition of physical boundaries in two-fluid flows

A coupled volume-of-fluid/immersed-boundary method for the study of propagating waves over complex-shaped bottom: Application to the solitary wave

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