Grain sedimentation with SPH-DEM and its validation

Martin Robinson; Stefan Luding; Marco Ramaioli

doi:10.1063/1.4812122

Grain sedimentation with SPH-DEM and its validation

Martin Robinson, Stefan Luding, Marco Ramaioli

Faculty of Engineering Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

5 Citations (Scopus)

176 Downloads (Pure)

Abstract

Our mesoscale simulation method [M. Robinson, S. Luding, and M. Ramaioli, submitted (2013)] for multiphase fluid-particle flows couples Smoothed Particle Hydrodynamics (SPH) and the Discrete Element Method (DEM) and enjoys the flexibility of meshless methods, such as being capable to handling free surface flows or flow around complex and/or moving geometries. We use this method to simulate three different sedimentation test cases and compare the results to existing analytical solutions. The grain velocity in Single Particle Sedimentation compares well (< 2% error) with the analytical solution as long as the fluid resolution is coarser than two times the particle diameter. The multiple particle sedimentation problem and Rayleigh Taylor Instability (RTI) also perform well against the theory, but it was found that the method is susceptible to fluid velocity fluctuations in the presence of high porosity gradients. These fluctuations can be damped by the addition of a dissipation term, which has no effect on the terminal velocity but can lead to slower growth rates for the RTI.

Original language	English
Title of host publication	Powders and Grains 2013
Subtitle of host publication	Proceedings of the 7th International Conference on Micromechanics of Granular Media
Editors	Aibing Yu, Kejun Dong, Runyu Yang, Stefan Luding
Publisher	American Institute of Physics
Pages	1079-1082
ISBN (Print)	978-0-7354-1166-1
DOIs	https://doi.org/10.1063/1.4812122
Publication status	Published - 8 Jul 2013
Event	7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013 - Sydney, Australia Duration: 8 Jul 2013 → 12 Jul 2013 Conference number: 7 http://www.pg2013.unsw.edu.au/

Publication series

Name	AIP Conference Proceedings
Publisher	AIP Publishing LLC
Volume	1542
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013
Abbreviated title	Powders & Grains
Country/Territory	Australia
City	Sydney
Period	8/07/13 → 12/07/13
Internet address	http://www.pg2013.unsw.edu.au/

Keywords

SPH
DEM
Fluid-particle flow
Discrete particle model
Sedimentation
Rayleigh-Taylor instability
PARDEM

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10.1063/1.4812122Licence: CC BY

Robinson2013grainFinal published version, 217 KBLicence: CC BY

Cite this

Robinson, M., Luding, S., & Ramaioli, M. (2013). Grain sedimentation with SPH-DEM and its validation. In A. Yu, K. Dong, R. Yang, & S. Luding (Eds.), Powders and Grains 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media (pp. 1079-1082). (AIP Conference Proceedings; Vol. 1542). American Institute of Physics. https://doi.org/10.1063/1.4812122

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title = "Grain sedimentation with SPH-DEM and its validation",

abstract = "Our mesoscale simulation method [M. Robinson, S. Luding, and M. Ramaioli, submitted (2013)] for multiphase fluid-particle flows couples Smoothed Particle Hydrodynamics (SPH) and the Discrete Element Method (DEM) and enjoys the flexibility of meshless methods, such as being capable to handling free surface flows or flow around complex and/or moving geometries. We use this method to simulate three different sedimentation test cases and compare the results to existing analytical solutions. The grain velocity in Single Particle Sedimentation compares well (< 2% error) with the analytical solution as long as the fluid resolution is coarser than two times the particle diameter. The multiple particle sedimentation problem and Rayleigh Taylor Instability (RTI) also perform well against the theory, but it was found that the method is susceptible to fluid velocity fluctuations in the presence of high porosity gradients. These fluctuations can be damped by the addition of a dissipation term, which has no effect on the terminal velocity but can lead to slower growth rates for the RTI.",

keywords = "SPH, DEM, Fluid-particle flow, Discrete particle model, Sedimentation, Rayleigh-Taylor instability, PARDEM",

author = "Martin Robinson and Stefan Luding and Marco Ramaioli",

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doi = "10.1063/1.4812122",

language = "English",

isbn = "978-0-7354-1166-1",

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booktitle = "Powders and Grains 2013",

address = "United States",

note = "7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013, Powders & Grains ; Conference date: 08-07-2013 Through 12-07-2013",

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Robinson, M, Luding, S & Ramaioli, M 2013, Grain sedimentation with SPH-DEM and its validation. in A Yu, K Dong, R Yang & S Luding (eds), Powders and Grains 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media. AIP Conference Proceedings, vol. 1542, American Institute of Physics, pp. 1079-1082, 7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013, Sydney, New South Wales, Australia, 8/07/13. https://doi.org/10.1063/1.4812122

Grain sedimentation with SPH-DEM and its validation. / Robinson, Martin; Luding, Stefan; Ramaioli, Marco.
Powders and Grains 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media. ed. / Aibing Yu; Kejun Dong; Runyu Yang; Stefan Luding. American Institute of Physics, 2013. p. 1079-1082 (AIP Conference Proceedings; Vol. 1542).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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T1 - Grain sedimentation with SPH-DEM and its validation

AU - Robinson, Martin

AU - Luding, Stefan

AU - Ramaioli, Marco

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PY - 2013/7/8

Y1 - 2013/7/8

N2 - Our mesoscale simulation method [M. Robinson, S. Luding, and M. Ramaioli, submitted (2013)] for multiphase fluid-particle flows couples Smoothed Particle Hydrodynamics (SPH) and the Discrete Element Method (DEM) and enjoys the flexibility of meshless methods, such as being capable to handling free surface flows or flow around complex and/or moving geometries. We use this method to simulate three different sedimentation test cases and compare the results to existing analytical solutions. The grain velocity in Single Particle Sedimentation compares well (< 2% error) with the analytical solution as long as the fluid resolution is coarser than two times the particle diameter. The multiple particle sedimentation problem and Rayleigh Taylor Instability (RTI) also perform well against the theory, but it was found that the method is susceptible to fluid velocity fluctuations in the presence of high porosity gradients. These fluctuations can be damped by the addition of a dissipation term, which has no effect on the terminal velocity but can lead to slower growth rates for the RTI.

AB - Our mesoscale simulation method [M. Robinson, S. Luding, and M. Ramaioli, submitted (2013)] for multiphase fluid-particle flows couples Smoothed Particle Hydrodynamics (SPH) and the Discrete Element Method (DEM) and enjoys the flexibility of meshless methods, such as being capable to handling free surface flows or flow around complex and/or moving geometries. We use this method to simulate three different sedimentation test cases and compare the results to existing analytical solutions. The grain velocity in Single Particle Sedimentation compares well (< 2% error) with the analytical solution as long as the fluid resolution is coarser than two times the particle diameter. The multiple particle sedimentation problem and Rayleigh Taylor Instability (RTI) also perform well against the theory, but it was found that the method is susceptible to fluid velocity fluctuations in the presence of high porosity gradients. These fluctuations can be damped by the addition of a dissipation term, which has no effect on the terminal velocity but can lead to slower growth rates for the RTI.

KW - SPH

KW - DEM

KW - Fluid-particle flow

KW - Discrete particle model

KW - Sedimentation

KW - Rayleigh-Taylor instability

KW - PARDEM

U2 - 10.1063/1.4812122

DO - 10.1063/1.4812122

M3 - Conference contribution

SN - 978-0-7354-1166-1

T3 - AIP Conference Proceedings

SP - 1079

EP - 1082

BT - Powders and Grains 2013

A2 - Yu, Aibing

A2 - Dong, Kejun

A2 - Yang, Runyu

A2 - Luding, Stefan

PB - American Institute of Physics

T2 - 7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013

Y2 - 8 July 2013 through 12 July 2013

ER -

Grain sedimentation with SPH-DEM and its validation

Abstract

Publication series

Conference

Keywords

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