Comparison of numerical schemes for 3D lattice Boltzmann simulations of moving rigid particles in thermal fluid flows

The ordering of particles in the drying process of a colloidal suspension is crucial in determining the properties of the resulting film. For example, microscopic inhomogeneities can lead to the formation of cracks and defects that can deteriorate the quality of the film considerably. This type of problem is inherently multiscale and here we study it numerically, using our recently developed method for the simulation of soft polymeric capsules in multicomponent fluids. We focus on the effect of the particle softness on the film microstructure during the drying phase and how it relates to the formation of defects. We quantify the order of the particles by measuring both the Voronoi entropy and the isotropic order parameter. Surprisingly, both observables exhibit a non-monotonic behaviour when the softness of the particles is increased. We further investigate the correlation between the interparticle interaction and the change in the microstructure during the evaporation phase. We observe that the rigid particles form chain-like structures that tend to scatter into small clusters when the particle softness is increased. This article is part of the theme issue ‘Progress in mesoscale methods for fluid dynamics simulation’.

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Multi Relaxation Time Lattice Boltzmann Simulations of Multiple Component Fluid Flows in Porous Media

High Performance Computing in Science and Engineering ‘12 ◽

10.1007/978-3-642-33374-3_5 ◽

2012 ◽

pp. 39-49 ◽

Cited By ~ 4

Author(s):

Sebastian Schmieschek ◽

Ariel Narváez ◽

Jens Harting

Keyword(s):

Porous Media ◽

Relaxation Time ◽

Lattice Boltzmann ◽

Fluid Flows ◽

Flows In Porous Media ◽

Lattice Boltzmann Simulations ◽

Multiple Component

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Lattice Boltzmann simulations of viscoplastic fluid flows through complex flow channels

Journal of Non-Newtonian Fluid Mechanics ◽

10.1016/j.jnnfm.2011.01.011 ◽

2011 ◽

Vol 166 (7-8) ◽

pp. 404-412 ◽

Cited By ~ 20

Author(s):

Mitsuhiro Ohta ◽

Tatsuya Nakamura ◽

Yutaka Yoshida ◽

Yosuke Matsukuma

Keyword(s):

Lattice Boltzmann ◽

Fluid Flows ◽

Viscoplastic Fluid ◽

Complex Flow ◽

Flow Channels ◽

Lattice Boltzmann Simulations

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Large-scale lattice Boltzmann simulations of complex fluids: advances through the advent of computational Grids

Philosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciences ◽

10.1098/rsta.2005.1618 ◽

2005 ◽

Vol 363 (1833) ◽

pp. 1895-1915 ◽

Cited By ~ 61

Author(s):

Jens Harting ◽

Jonathan Chin ◽

Maddalena Venturoli ◽

Peter V Coveney

Keyword(s):

Lattice Boltzmann ◽

Large Scale ◽

Three Dimensional ◽

Fluid Flows ◽

Scientific Work ◽

Computational Grids ◽

Computational Steering ◽

Lattice Boltzmann Simulations ◽

Complex Fluid ◽

Visualization Techniques

During the last 2.5 years, the RealityGrid project has allowed us to be one of the few scientific groups involved in the development of computational Grids. Since smoothly working production Grids are not yet available, we have been able to substantially influence the direction of software and Grid deployment within the project. In this paper, we review our results from large-scale three-dimensional lattice Boltzmann simulations performed over the last 2.5 years. We describe how the proactive use of computational steering, and advanced job migration and visualization techniques enabled us to do our scientific work more efficiently. The projects reported on in this paper are studies of complex fluid flows under shear or in porous media, as well as large-scale parameter searches, and studies of the self-organization of liquid cubic mesophases.

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