Direct simulation of liquid–gas–solid flow with a free surface lattice Boltzmann method
| Autor: | Ulrich Rüde, Simon Bogner, Jdr Jens Harting |
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| Rok vydání: | 2017 |
| Předmět: |
Length scale
Materials science Lattice Boltzmann method Computational Mechanics Direct numerical simulation Lattice Boltzmann methods FOS: Physical sciences Energy Engineering and Power Technology Aerospace Engineering bubble simulation 02 engineering and technology 01 natural sciences 010305 fluids & plasmas 020401 chemical engineering 0103 physical sciences 0204 chemical engineering liquid–gas–solid flow Computer Science::Distributed Parallel and Cluster Computing particle suspension simulation Liquid gas Mechanical Engineering Fluid Dynamics (physics.flu-dyn) Physics - Fluid Dynamics Mechanics Computational Physics (physics.comp-ph) Condensed Matter Physics Grid Flow (mathematics) Mechanics of Materials Free surface free surface flow Physics - Computational Physics |
| Zdroj: | International Journal of Computational Fluid Dynamics, 31(10), 463-475. Taylor and Francis Ltd. |
| ISSN: | 1029-0257 1061-8562 |
| Popis: | Direct numerical simulation of liquid-gas-solid flows is uncommon due to the considerable computational cost. As the grid spacing is determined by the smallest involved length scale, large grid sizes become necessary -- in particular if the bubble-particle aspect ratio is on the order of 10 or larger. Hence, it arises the question of both feasibility and reasonability. In this paper, we present a fully parallel, scalable method for direct numerical simulation of bubble-particle interaction at a size ratio of 1-2 orders of magnitude that makes simulations feasible on currently available super-computing resources. With the presented approach, simulations of bubbles in suspension columns consisting of more than $100\,000$ fully resolved particles become possible. Furthermore, we demonstrate the significance of particle-resolved simulations by comparison to previous unresolved solutions. The results indicate that fully-resolved direct numerical simulation is indeed necessary to predict the flow structure of bubble-particle interaction problems correctly. Comment: submitted to International Journal of Computational Fluid Dynamics |
| Databáze: | OpenAIRE |
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