An immersed boundary method for the simulation of bubbles with varying shape

Schwarz, Stephan; Kempe, Tobias; Fröhlich, Jochen

doi:10.1016/j.jcp.2016.01.033

Cited by 23 publications

(19 citation statements)

References 71 publications

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“…The numerical simulations were performed using the multiphase code PRIME [13] with the extensions presented in [14] and [15]. It solves the incompressible Navier-Stokes equations on a staggered Cartesian grid by a finite-volume method and employs an immersed boundary method (IBM) for the coupling between fluids and bubbles.…”

Section: Methodsmentioning

confidence: 99%

Combined experimental and numerical analysis of a bubbly liquid metal flow

Krull

Strumpf

Keplinger

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The paper proposes a combined experimental and numerical procedure for the investigation of bubbly liquid-metal flows. It describes the application to a model configuration consisting of a recirculating GaInSn flow driven by an argon bubble chain. The experimental methods involve X-ray measurements to detect the bubbles and UDV measurements to gain velocity information about the liquid metal. The chosen numerical method is an immersed boundary method extended to deformable bubbles. The model configuration includes typical phenomena occurring in industrial applications and allows insight into the physics of bubbly liquid-metal flows. It constitutes an attractive test case for assessing further experimental and numerical methods.

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Section: Methodsmentioning

confidence: 99%

Combined experimental and numerical analysis of a bubbly liquid metal flow

Krull

Strumpf

Keplinger

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Numerical modeling, therefore, has a complementary role in understanding the dynamics of bubbly flows. Normally, the carrier fluid is treated as the continuous phase, with the bubbles considered as the dispersed or discrete phase, with Eulerian–Eulerian, Eulerian–Lagrangian, and fully resolved approaches adopted. Discussions of the relative merits and disadvantages of each of these approaches are available elsewhere .…”

Section: Introductionmentioning

confidence: 99%

Large eddy simulation of microbubble dispersion and flow field modulation in vertical channel flows

et al. 2019

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Turbulent liquid–gas vertical channel flows laden with microbubbles are investigated using large eddy simulation (LES) two‐way coupled to a Lagrangian bubble tracking technique. Upward and downward flows at shear Reynolds numbers of Re τ = 150 and 590 are analyzed for three different microbubble diameters of 110, 220, and 330 μm. Predicted results are compared with published direct numerical simulation results although, with respect to comparable studies available in the literature, the range of bubble diameters and shear Reynolds numbers considered herein is extended to larger values. Microbubble concentration profiles are analyzed, with the microbubbles segregating at the wall in upflow conditions and moving toward the channel centre in downflow. The various forces acting on the bubbles, and the effect of the flow turbulence on the bubble concentration, are considered and quantified. Overall, the results suggest that the level of detail achievable with LES is sufficient to predict the fluid structures impacting bubble behavior. Therefore, LES coupled with Lagrangian bubble tracking shows promise for enabling the reliable prediction of bubble‐laden flows that are of industrial relevance. © 2018 American Institute of Chemical Engineers AIChE J, 65: 1325–1339, 2019

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“…One particular field where IBM has excelled is in the simulation of dispersed rigid particles in highly turbulent flows [4][5][6][7]. Recent works have shown that while the extension from rigid particles to deformable particles is highly non-trivial it can be achieved with the help of optimised deformation and parallelisation algorithms [8,9,11].…”

Section: Introductionmentioning

confidence: 99%

A fast moving least squares approximation with adaptive Lagrangian mesh refinement for large scale immersed boundary simulations

Spandan

Lohse

Tullio

et al. 2018

Journal of Computational Physics

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In this paper we propose and test the validity of simple and easy-to-implement algorithms within the immersed boundary framework geared towards large scale simulations involving thousands of deformable bodies in highly turbulent flows. First, we introduce a fast moving least squares (fast-MLS) approximation technique with which we speed up the process of building transfer functions during the simulations which leads to considerable reductions in computational time. We compare the accuracy of the fast-MLS against the exact moving least squares (MLS) for the standard problem of uniform flow over a sphere. In order to overcome the restrictions set by the resolution coupling of the Lagrangian and Eulerian meshes in this particular immersed boundary method, we present an adaptive Lagrangian mesh refinement procedure that is capable of drastically reducing the number of required nodes of the basic Lagrangian mesh when the immersed boundaries can move and deform. Finally, a coarse-grained collision detection algorithm is presented which can detect collision events between several Lagrangian markers residing on separate complex geometries with minimal computational overhead.

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An immersed boundary method for the simulation of bubbles with varying shape

Cited by 23 publications

References 71 publications

Combined experimental and numerical analysis of a bubbly liquid metal flow

Combined experimental and numerical analysis of a bubbly liquid metal flow

Large eddy simulation of microbubble dispersion and flow field modulation in vertical channel flows

A fast moving least squares approximation with adaptive Lagrangian mesh refinement for large scale immersed boundary simulations

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