eprintid: 10197716
rev_number: 10
eprint_status: archive
userid: 699
dir: disk0/10/19/77/16
datestamp: 2024-09-30 13:05:01
lastmod: 2024-09-30 13:05:01
status_changed: 2024-09-30 13:05:01
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Song, Shun‐Xiang
creators_name: Yin, Zhen‐Yu
creators_name: Liu, Ya‐Jing
creators_name: Wang, Pei
creators_name: Cheng, Yi‐Pik
title: Investigation of Suffusion Under Torsional Shear Conditions With CFD‐DEM
ispublished: inpress
divisions: UCL
divisions: B04
divisions: F44
note: © 2024 The Author(s). International Journal for Numerical and Analytical Methods in Geomechanics published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/).
abstract: This study investigates, for the first time ever, the suffusion on gap‐graded granular soils under torsional shear conditions from a microscopic perspective. A numerical model of the hollow cylinder torsional shear test (HCTST) using the discrete element method (DEM) is first developed, where an algorithm for simulating the real inner and outer rubber membranes of the hollow cylinder apparatus (HCA) is introduced. After the validation, the computational fluid dynamics (CFD) approach is introduced for the coupling between the particle and fluid phases. Then, a series of the coupled CFD‐DEM suffusion simulations considering the rotation of the major principal stress axis (α) and intermediate principal stress ratio (b) are conducted. It is found that more fine particles are eroded in cases having smaller α and b, and the clogging phenomenon in the middle zones becomes more significant as both α and b increase. From the microscopic perspective, the specimens whose contact anisotropy principal direction is close to the fluid direction will lose more fines, and the anisotropy magnitude also plays an important role. In addition, the differences in structure and vertical connectivity of the pores in HCTST samples under various complex loading conditions cause fine particles to have different migration paths, further resulting in different fines mass loss.
date: 2024-09-24
date_type: published
publisher: Wiley
official_url: http://dx.doi.org/10.1002/nag.3844
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2322861
doi: 10.1002/nag.3844
lyricists_name: Cheng, Yi
lyricists_id: YPCHE61
actors_name: Cheng, Yi
actors_id: YPCHE61
actors_role: owner
full_text_status: public
publication: International Journal for Numerical and Analytical Methods in Geomechanics
citation:        Song, Shun‐Xiang;    Yin, Zhen‐Yu;    Liu, Ya‐Jing;    Wang, Pei;    Cheng, Yi‐Pik;      (2024)    Investigation of Suffusion Under Torsional Shear Conditions With CFD‐DEM.                   International Journal for Numerical and Analytical Methods in Geomechanics        10.1002/nag.3844 <https://doi.org/10.1002/nag.3844>.    (In press).    Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10197716/7/Cheng_Investigation%20of%20Suffusion%20Under%20Torsional%20Shear%20Conditions%20With%20CFD%E2%80%90DEM_AOP.pdf