scholarly journals Particle-resolved lattice Boltzmann simulations of 3-dimensional active turbulence

Soft Matter ◽  
2019 ◽  
Vol 15 (39) ◽  
pp. 7747-7756 ◽  
Author(s):  
Dóra Bárdfalvy ◽  
Henrik Nordanger ◽  
Cesare Nardini ◽  
Alexander Morozov ◽  
Joakim Stenhammar
Keyword(s):  
Lattice Boltzmann ◽  
Large Scale ◽  
3 Dimensional ◽  
Lattice Boltzmann Simulations ◽  
Theoretical Predictions ◽  
Active Turbulence ◽  
Swimming Bacteria

The dynamics of active turbulence in a suspension of swimming bacteria is characterised using large-scale lattice Boltzmann simulations of model microswimmers and compared to theoretical predictions.

scholarly journals Large-scale lattice-Boltzmann simulations over lambda networks

2007 ◽  
Author(s):  
Radhika Saksena ◽  
Peter V. Coveney ◽  
Robin Pinning ◽  
Stephen Booth
Keyword(s):  
Lattice Boltzmann ◽  
Large Scale ◽  
Lattice Boltzmann Simulations

scholarly journals Equilibrium Orientation and Adsorption of an Ellipsoidal Janus Particle at a Fluid–Fluid Interface

2020 ◽  
Vol 4 (4) ◽  
pp. 55
Author(s):  
Florian Günther ◽  
Qingguang Xie ◽  
Jens Harting
Keyword(s):  
Free Energy ◽  
Lattice Boltzmann ◽  
Adsorption Process ◽  
Particle Surface ◽  
Fluid Interface ◽  
Janus Particle ◽  
Energy Models ◽  
Lattice Boltzmann Simulations ◽  
Theoretical Predictions ◽  
Particle Aspect Ratio

We investigate the equilibrium orientation and adsorption process of a single, ellipsoidal Janus particle at a fluid–fluid interface. The particle surface comprises equally sized parts that are hydrophobic or hydrophilic. We present free energy models to predict the equilibrium orientation and compare the theoretical predictions with lattice Boltzmann simulations. We find that the deformation of the fluid interface strongly influences the equilibrium orientation of the Janus ellipsoid. The adsorption process of the Janus ellipsoid can lead to different final orientations determined by the interplay of particle aspect ratio and particle wettablity contrast.

241 Large-scale phase-field lattice Boltzmann simulations of dendrite growth with melt convection

2015 ◽  
Vol 2015.28 (0) ◽  
pp. _241-1_-_241-2_
Author(s):  
Tomohiro Takaki ◽  
Shinji Sakane ◽  
Roberto Rojas ◽  
Munekazu Ohno ◽  
Yasushi ◽  
...  
Keyword(s):  
Phase Field ◽  
Lattice Boltzmann ◽  
Large Scale ◽  
Dendrite Growth ◽  
Lattice Boltzmann Simulations ◽  
Melt Convection

Petascale lattice-Boltzmann studies of amphiphilic cubic liquid crystalline materials in a globally distributed high-performance computing and visualization environment

2010 ◽  
Vol 368 (1925) ◽  
pp. 3983-3999 ◽  
Author(s):  
Radhika S. Saksena ◽  
Marco D. Mazzeo ◽  
Stefan J. Zasada ◽  
Peter V. Coveney
Keyword(s):  
Lattice Boltzmann ◽  
High Performance ◽  
Liquid Crystalline ◽  
Large Scale ◽  
Materials Science ◽  
Protein Crystallization ◽  
Ternary Mixtures ◽  
Remote Visualization ◽  
Lattice Boltzmann Simulations ◽  
Self Assembled

We present very large-scale rheological studies of self-assembled cubic gyroid liquid crystalline phases in ternary mixtures of oil, water and amphiphilic species performed on petascale supercomputers using the lattice-Boltzmann method. These nanomaterials have found diverse applications in materials science and biotechnology, for example, in photovoltaic devices and protein crystallization. They are increasingly gaining importance as delivery vehicles for active agents in pharmaceuticals, personal care products and food technology. In many of these applications, the self-assembled structures are subject to flows of varying strengths and we endeavour to understand their rheological response with the objective of eventually predicting it under given flow conditions. Computationally, our lattice-Boltzmann simulations of ternary fluids are inherently memory- and data-intensive. Furthermore, our interest in dynamical processes necessitates remote visualization and analysis as well as the associated transfer and storage of terabytes of time-dependent data. These simulations are distributed on a high-performance grid infrastructure using the application hosting environment; we employ a novel parallel in situ visualization approach which is particularly suited for such computations on petascale resources. We present computational and I/O performance benchmarks of our application on three different petascale systems.

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

2005 ◽  
Vol 363 (1833) ◽  
pp. 1895-1915 ◽  
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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