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A coupled DEM-SPH model for moisture migration in unsaturated granular material under oscillation
School of Engineering, The University of Newcastle, Callaghan, Australia.
School of Engineering, The University of Newcastle, Callaghan, Australia. Centre for Bulk Solids and Particulate Technologies, Newcastle Institute for Energy and Resources, The University of Newcastle, Callaghan, Australia.
School of Engineering, The University of Newcastle, Callaghan, Australia. Centre for Bulk Solids and Particulate Technologies, Newcastle Institute for Energy and Resources, The University of Newcastle, Callaghan, Australia.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
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2020 (English)In: International Journal of Mechanical Sciences, ISSN 0020-7403, E-ISSN 1879-2162, Vol. 169, article id 105313Article in journal (Refereed) Published
Abstract [en]

Granular materials, such as mineral products, soil and chemical fertilizer, normally contain unsaturated free moisture. This unsaturated moisture could migrate in the granular material and its processing, resulting in handling and safety concerns due to a change in the material properties. In this work, a method of coupling the Discrete Element Method (DEM) and the Smoothed Particle Hydrodynamics (SPH) was proposed to investigate moisture migration in unsaturated granular materials under oscillation. The particles and water were simulated through DEM and SPH, respectively and a python coupling framework was programmed to perform the exchange of particle-fluid interaction forces. Subsequently, experiments with plastic pellets and a coal sample were used to calibrate the models, with DEM calibrated by an angle of repose experiment and draining experiments calibrating the coupled model. Finally, the coupled model was validated by comparing the results to those of experiments involving moisture migration under oscillation. It was found that, compared to measurements, the coupled SPH-DEM model predicted the same moisture migration trend and also provided good agreement for the prediction of the mass of drained water.

Place, publisher, year, edition, pages
2020. Vol. 169, article id 105313
Keywords [en]
Moisture migration, DEM-SPH, Unsaturated granular materials, Cyclic oscillation
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-76848DOI: 10.1016/j.ijmecsci.2019.105313Scopus ID: 2-s2.0-85074908301OAI: oai:DiVA.org:ltu-76848DiVA, id: diva2:1372765
Note

Validerad;2019;Nivå 2;2019-11-25 (johcin)

Available from: 2019-11-25 Created: 2019-11-25 Last updated: 2019-11-25Bibliographically approved

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Meng, Jingjing

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