Discrete particle modeling of granular Rayleigh-Taylor instability

Z. Y. Yu; C. L. Wu; A. S. Berrouk; K. Nandakumar

doi:10.1016/j.ijmultiphaseflow.2015.08.010

Discrete particle modeling of granular Rayleigh-Taylor instability

Z. Y. Yu, C. L. Wu^*, A. S. Berrouk, K. Nandakumar

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

The gravitational air-grain Rayleigh-Taylor (RT) flow instability in a Hele-Shaw cell was studied using a parallel three-dimensional discrete particle model (DPM). The onset of flow instability and the development of fingering flow structures were well captured by the model. Power spectra analysis of solid volume fraction field indicated the non-linear coarsening process of the fingering flow structures. The sensitivity of the flow patterns to the initial porosity, the Atwood number, and the ratio of particle size to the Hele-Shaw cell width was also demonstrated. The excellent agreement of DPM simulation results with the reported experimental observations proved the robustness and reliability of the numerical approach to model complex multiphase flows such as granular RT instability.

Original language	English
Pages (from-to)	260-270
Number of pages	11
Journal	International Journal of Multiphase Flow
Volume	77
DOIs	https://doi.org/10.1016/j.ijmultiphaseflow.2015.08.010
State	Published - 1 Dec 2015
Externally published	Yes

Keywords

Discrete particle/element method
Granular flow
Rayleigh-Taylor instability

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10.1016/j.ijmultiphaseflow.2015.08.010

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title = "Discrete particle modeling of granular Rayleigh-Taylor instability",

abstract = "The gravitational air-grain Rayleigh-Taylor (RT) flow instability in a Hele-Shaw cell was studied using a parallel three-dimensional discrete particle model (DPM). The onset of flow instability and the development of fingering flow structures were well captured by the model. Power spectra analysis of solid volume fraction field indicated the non-linear coarsening process of the fingering flow structures. The sensitivity of the flow patterns to the initial porosity, the Atwood number, and the ratio of particle size to the Hele-Shaw cell width was also demonstrated. The excellent agreement of DPM simulation results with the reported experimental observations proved the robustness and reliability of the numerical approach to model complex multiphase flows such as granular RT instability.",

keywords = "Discrete particle/element method, Granular flow, Rayleigh-Taylor instability",

author = "Yu, {Z. Y.} and Wu, {C. L.} and Berrouk, {A. S.} and K. Nandakumar",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2015",

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doi = "10.1016/j.ijmultiphaseflow.2015.08.010",

language = "英语",

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journal = "International Journal of Multiphase Flow",

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TY - JOUR

T1 - Discrete particle modeling of granular Rayleigh-Taylor instability

AU - Yu, Z. Y.

AU - Wu, C. L.

AU - Berrouk, A. S.

AU - Nandakumar, K.

PY - 2015/12/1

Y1 - 2015/12/1

N2 - The gravitational air-grain Rayleigh-Taylor (RT) flow instability in a Hele-Shaw cell was studied using a parallel three-dimensional discrete particle model (DPM). The onset of flow instability and the development of fingering flow structures were well captured by the model. Power spectra analysis of solid volume fraction field indicated the non-linear coarsening process of the fingering flow structures. The sensitivity of the flow patterns to the initial porosity, the Atwood number, and the ratio of particle size to the Hele-Shaw cell width was also demonstrated. The excellent agreement of DPM simulation results with the reported experimental observations proved the robustness and reliability of the numerical approach to model complex multiphase flows such as granular RT instability.

AB - The gravitational air-grain Rayleigh-Taylor (RT) flow instability in a Hele-Shaw cell was studied using a parallel three-dimensional discrete particle model (DPM). The onset of flow instability and the development of fingering flow structures were well captured by the model. Power spectra analysis of solid volume fraction field indicated the non-linear coarsening process of the fingering flow structures. The sensitivity of the flow patterns to the initial porosity, the Atwood number, and the ratio of particle size to the Hele-Shaw cell width was also demonstrated. The excellent agreement of DPM simulation results with the reported experimental observations proved the robustness and reliability of the numerical approach to model complex multiphase flows such as granular RT instability.

KW - Discrete particle/element method

KW - Granular flow

KW - Rayleigh-Taylor instability

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U2 - 10.1016/j.ijmultiphaseflow.2015.08.010

DO - 10.1016/j.ijmultiphaseflow.2015.08.010

M3 - 文章

AN - SCOPUS:84944038541

SN - 0301-9322

VL - 77

SP - 260

EP - 270

JO - International Journal of Multiphase Flow

JF - International Journal of Multiphase Flow

ER -

Discrete particle modeling of granular Rayleigh-Taylor instability

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Keywords

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