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Article: Efficient lattice Boltzmann simulation of free-surface granular flows with μ(I)-rheology

TitleEfficient lattice Boltzmann simulation of free-surface granular flows with μ(I)-rheology
Authors
KeywordsFree surface
Granular flow
Lattice Boltzmann
Multiscale
Issue Date8-Jan-2023
PublisherElsevier
Citation
Journal of Computational Physics, 2023, v. 479 How to Cite?
Abstract

This paper presents a lattice Boltzmann framework for accurate and efficient simulation of free-surface granular flows. The granular assembly is treated as a viscoplastic fluid, whose apparent viscosity varies locally with the shear rate and pressure according to a regularized u(I)-rheology. A single-phase free-surface model is employed to track the evolution of the particle-air interface. The lattice Boltzmann implementation is first validated by simulating a steady-state granular flow on a rough inclined plane and a good agreement with the analytical solution is achieved. The validated model is then applied to simulate a transient granular column collapse problem. Compared to a companion discrete element simulation, the lattice Boltzmann model with the u(I)-rheology is able to capture the overall dynamic behaviors of granular column collapse. However, a different behavior is observed when a similar Bingham viscoplastic model with a fixed yield stress is applied, highlighting the pressure dependent nature of granular flows. The proposed lattice Boltzmann formulation is highly efficient compared to the conventional computational fluid dynamics, and has the potential to conduct three-dimensional continuum simulation of large-scale geophysical flows with microscopic granular physics.


Persistent Identifierhttp://hdl.handle.net/10722/338157
ISSN
2023 Impact Factor: 3.8
2023 SCImago Journal Rankings: 1.679
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYang, GC-
dc.contributor.authorYang, SC-
dc.contributor.authorJing, L-
dc.contributor.authorKwok, CY-
dc.contributor.authorSobral, YD-
dc.date.accessioned2024-03-11T10:26:41Z-
dc.date.available2024-03-11T10:26:41Z-
dc.date.issued2023-01-08-
dc.identifier.citationJournal of Computational Physics, 2023, v. 479-
dc.identifier.issn0021-9991-
dc.identifier.urihttp://hdl.handle.net/10722/338157-
dc.description.abstract<p>This paper presents a lattice Boltzmann framework for accurate and efficient simulation of free-surface granular flows. The granular assembly is treated as a viscoplastic fluid, whose apparent viscosity varies locally with the shear rate and pressure according to a regularized u(I)-rheology. A single-phase free-surface model is employed to track the evolution of the particle-air interface. The lattice Boltzmann implementation is first validated by simulating a steady-state granular flow on a rough inclined plane and a good agreement with the analytical solution is achieved. The validated model is then applied to simulate a transient granular column collapse problem. Compared to a companion discrete element simulation, the lattice Boltzmann model with the u(I)-rheology is able to capture the overall dynamic behaviors of granular column collapse. However, a different behavior is observed when a similar Bingham viscoplastic model with a fixed yield stress is applied, highlighting the pressure dependent nature of granular flows. The proposed lattice Boltzmann formulation is highly efficient compared to the conventional <a href="https://www.sciencedirect.com/topics/physics-and-astronomy/computational-fluid-dynamics" title="Learn more about computational fluid dynamics from ScienceDirect's AI-generated Topic Pages">computational fluid dynamics</a>, and has the potential to conduct three-dimensional continuum simulation of large-scale geophysical flows with microscopic granular <a href="https://www.sciencedirect.com/topics/physics-and-astronomy/physics" title="Learn more about physics from ScienceDirect's AI-generated Topic Pages">physics</a>.<br></p>-
dc.languageeng-
dc.publisherElsevier-
dc.relation.ispartofJournal of Computational Physics-
dc.subjectFree surface-
dc.subjectGranular flow-
dc.subjectLattice Boltzmann-
dc.subjectMultiscale-
dc.titleEfficient lattice Boltzmann simulation of free-surface granular flows with μ(I)-rheology-
dc.typeArticle-
dc.identifier.doi10.1016/j.jcp.2023.111956-
dc.identifier.scopuseid_2-s2.0-85149270668-
dc.identifier.volume479-
dc.identifier.eissn1090-2716-
dc.identifier.isiWOS:000949849700001-
dc.identifier.issnl0021-9991-

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