Coupling granular size segregation and cyclic-loading-induced crushing effects in a continuum model
The kinetic sieving mechanism is a well-known continuum method for modelling granular size segregation phenomena, typically solved for steady-state chute flows. In this thesis, we develop a model to include normal confining pressure dependence, time-dependence and evolving velocity profiles thro...
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| Format: | Thesis (University of Nottingham only) |
| Language: | English |
| Published: |
2024
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| Online Access: | https://eprints.nottingham.ac.uk/77432/ |
| _version_ | 1848800998372409344 |
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| author | Zhang, Jiaxin |
| author_facet | Zhang, Jiaxin |
| author_sort | Zhang, Jiaxin |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | The kinetic sieving mechanism is a well-known continuum method for modelling granular size segregation phenomena, typically solved for steady-state chute flows.
In this thesis, we develop a model to include normal confining pressure dependence, time-dependence and evolving velocity profiles through the grain body. This enabled more sophisticated granular behaviours and feed-backs to be explored - in particular, those relevant to cyclic loading of soils through e.g. wind turbine foundations. An iterative expansion approach is proposed to self-expand the classic bi-disperse or tri-disperse segregation problem towards arbitrarily poly-disperse systems, with minimal change of input parameters and data structures.
Under pair-wise stress partition and segregation relationships, behaviour can be directly linked to size ratios. Simulations show the dependence on particle size distribution alongside the controlling non-dimensional parameters: inter-particle drag, diffusion rate and confining pressure.
The final goal of this project was to couple particle crushing with the validated poly-disperse segregation model. After exploring possible ways of incorporating breakage, solid volume fraction re-distribution was tested in a 10-population problem with clear feed-backs from the prescribed crushing. |
| first_indexed | 2025-11-14T21:00:28Z |
| format | Thesis (University of Nottingham only) |
| id | nottingham-77432 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T21:00:28Z |
| publishDate | 2024 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-774322024-07-18T04:40:18Z https://eprints.nottingham.ac.uk/77432/ Coupling granular size segregation and cyclic-loading-induced crushing effects in a continuum model Zhang, Jiaxin The kinetic sieving mechanism is a well-known continuum method for modelling granular size segregation phenomena, typically solved for steady-state chute flows. In this thesis, we develop a model to include normal confining pressure dependence, time-dependence and evolving velocity profiles through the grain body. This enabled more sophisticated granular behaviours and feed-backs to be explored - in particular, those relevant to cyclic loading of soils through e.g. wind turbine foundations. An iterative expansion approach is proposed to self-expand the classic bi-disperse or tri-disperse segregation problem towards arbitrarily poly-disperse systems, with minimal change of input parameters and data structures. Under pair-wise stress partition and segregation relationships, behaviour can be directly linked to size ratios. Simulations show the dependence on particle size distribution alongside the controlling non-dimensional parameters: inter-particle drag, diffusion rate and confining pressure. The final goal of this project was to couple particle crushing with the validated poly-disperse segregation model. After exploring possible ways of incorporating breakage, solid volume fraction re-distribution was tested in a 10-population problem with clear feed-backs from the prescribed crushing. 2024-07-18 Thesis (University of Nottingham only) NonPeerReviewed application/pdf en cc_by https://eprints.nottingham.ac.uk/77432/1/Jiaxin_Thesis_with_UoN_template__correction_%20final.pdf Zhang, Jiaxin (2024) Coupling granular size segregation and cyclic-loading-induced crushing effects in a continuum model. PhD thesis, University of Nottingham. granular segregation breakage cyclic loading |
| spellingShingle | granular segregation breakage cyclic loading Zhang, Jiaxin Coupling granular size segregation and cyclic-loading-induced crushing effects in a continuum model |
| title | Coupling granular size segregation and cyclic-loading-induced crushing effects in a continuum model |
| title_full | Coupling granular size segregation and cyclic-loading-induced crushing effects in a continuum model |
| title_fullStr | Coupling granular size segregation and cyclic-loading-induced crushing effects in a continuum model |
| title_full_unstemmed | Coupling granular size segregation and cyclic-loading-induced crushing effects in a continuum model |
| title_short | Coupling granular size segregation and cyclic-loading-induced crushing effects in a continuum model |
| title_sort | coupling granular size segregation and cyclic-loading-induced crushing effects in a continuum model |
| topic | granular segregation breakage cyclic loading |
| url | https://eprints.nottingham.ac.uk/77432/ |