Assessment of a subgrid-scale model for convection-dominated mass transfer for initial transient rise of a bubble

The mass transfer between a rising bubble and the surrounding liquid is mainly determined by an extremely thin layer of dissolved gas forming at the liquid side of the gas-liquid interface. Resolving this concentration boundary layer in numerical simulations is computationally expensive. Subgrid-scale models mitigate the resolution requirements enormously and allow approximating the mass transfer in industrially relevant flow conditions with high accuracy. However, the development and validation of such models is difficult as only integral mass transfer data for steady-state conditions are available. Therefore, it is difficult to assess the validity of the sub-grid models in transient conditions. In this contribution, we compare the local and global mass transfer of an improved subgrid-scale model for rising bubbles (Re = 72-569 and Sc = 10^2-10^4) to a single-phase simulation approach, which maps the two-phase flow field to a highly-resolved mesh comprising only the liquid phase.

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An improved subgrid scale model for front‐tracking based simulations of mass transfer from bubbles

AIChE Journal ◽

10.1002/aic.16889 ◽

2019 ◽

Vol 66 (4) ◽

Cited By ~ 1

Author(s):

Claire M. Y. Claassen ◽

Shafiul Islam ◽

E. A. J. F. (Frank) Peters ◽

Niels G. Deen ◽

J. A. M. (Hans) Kuipers ◽

...

Keyword(s):

Mass Transfer ◽

Front Tracking ◽

Scale Model ◽

Subgrid Scale ◽

Subgrid Scale Model

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A subgrid-scale model for reactive concentration boundary layers for 3D mass transfer simulations with deformable fluid interfaces

International Journal of Heat and Mass Transfer ◽

10.1016/j.ijheatmasstransfer.2016.04.119 ◽

2016 ◽

Vol 101 ◽

pp. 476-487 ◽

Cited By ~ 10

Author(s):

Dirk Gründing ◽

Stefan Fleckenstein ◽

Dieter Bothe

Keyword(s):

Mass Transfer ◽

Boundary Layers ◽

Scale Model ◽

Fluid Interfaces ◽

Subgrid Scale ◽

Concentration Boundary ◽

Concentration Boundary Layers ◽

Subgrid Scale Model

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Comparison of Different Subgrid-Scale Models of Large Eddy Simulation for Indoor Airflow Modeling

Journal of Fluids Engineering ◽

10.1115/1.1378294 ◽

2001 ◽

Vol 123 (3) ◽

pp. 628-639 ◽

Cited By ~ 12

Author(s):

Mingde Su ◽

Qingyan Chen ◽

Che-Ming Chiang

Keyword(s):

Large Eddy Simulation ◽

Indoor Air ◽

Computing Time ◽

Scale Model ◽

Fast Fourier Transformation ◽

Subgrid Scale ◽

Eddy Simulation ◽

Scale Models ◽

Large Eddy ◽

Subgrid Scale Model

The Smagorinsky subgrid-scale model, a dynamic subgrid-scale model, and a stimulated subgrid-scale model have been used in a large eddy simulation (LES) program to compute airflow in a room. A fast Fourier transformation (FFT) method and a conventional iteration method were used in solving the Poisson equation. The predicted distributions of indoor air velocity, temperature, and contaminant concentrations show that the three subgrid-scale models can produce acceptable results for indoor environment design. The dynamic and stimulated models performed slightly better than the Smagorinsky model. The use of FFT can significantly reduce the computing time. LES is a tool of the next generation of indoor air distribution design.

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Improved subgrid scale model for dense turbulent solid-liquid two-phase flows

Acta Mechanica Sinica ◽

10.1007/bf02489373 ◽

2004 ◽

Vol 20 (4) ◽

pp. 354-365 ◽

Cited By ~ 2

Author(s):

Tang Xuelin ◽

Qian Zhongdong ◽

Wu Yulin

Keyword(s):

Scale Model ◽

Subgrid Scale ◽

Two Phase Flows ◽

Two Phase ◽

Subgrid Scale Model ◽

Solid Liquid

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The Use of Advanced LES Subgrid Scale Models in Combination With Dynamic Grid Adaptation

Emerging Technology in Fluids, Structures, and Fluid Structure Interactions ◽

10.1115/pvp2003-1954 ◽

2003 ◽

Author(s):

Govert de With ◽

Arne E. Holdo̸ ◽

Nick Peller

Keyword(s):

Flow Structure ◽

Turbulence Model ◽

A Priori ◽

Mesh Size ◽

Scale Model ◽

Subgrid Scale ◽

Grid Adaptation ◽

Scale Models ◽

Mesh Resolution ◽

Subgrid Scale Model

The use of Large Eddy Simulation (LES) is increasingly investigated. However, the LES simulations are computationally demanding, due to the transient nature of the flow computations and the required mesh resolution. Furthermore, the subgrid scale model used for modeling the unresolved flow motions is normally a-priori selected. In an unstructured mesh where the mesh resolution can vary significantly, subgrid scale models should be applied carefully. The present study is aimed to investigate the use of an advanced approach to reduce mesh size by means of a Dynamic Grid Adaptation (DGA) algorithm and to apply a LES subgrid scale model based on local mesh size and flow structure. In this work the DGA algorithm is coupled with the LES turbulence model and made an integral part of the turbulence model. Furthermore, this work has integrated two different LES subgrid scale models which are locally applied to the element in a dynamic manner, dependent on mesh size and flow structure.

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