GPU based discrete element modeling for convex polyhedral shape particles: Development and validation
Particle dynamics simulations face a significant challenge in understanding the intricate behaviors of convex polyhedral particles due to their complex geometries and interactions. DEM emerges as a key method, illuminating the concealed intricacies of these geometric entities. Traditional algorithms...
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| Vydáno v: | Powder technology Ročník 449; s. 120407 |
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| Hlavní autoři: | , , |
| Médium: | Journal Article |
| Jazyk: | angličtina |
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Elsevier B.V
15.01.2025
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| ISSN: | 0032-5910 |
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| Abstract | Particle dynamics simulations face a significant challenge in understanding the intricate behaviors of convex polyhedral particles due to their complex geometries and interactions. DEM emerges as a key method, illuminating the concealed intricacies of these geometric entities. Traditional algorithms often require cumbersome processes to check each type of contact individually. However, Gilbert–Johnson–Keerthi’s (GJK) and the expanding polytope algorithm (EPA) provide efficient numerical solutions for polyhedral contact detection and contact resolution. These Minkowski difference-based methods streamline contact detection and overlap computation, paving the way for deeper exploration of three-dimensional contact theory within DEM simulations. By leveraging GPU computational power, this paper outlines key algorithmic steps and verifies the solver’s accuracy through comparison with simulated and experimental data, with an average deviation of less than 5%. This study explores the impact of particle shape on the dynamics and mechanical behavior of densely packed systems, particularly in hoppers and tumblers. Spherical particles discharge faster but mix more slowly than polyhedral shapes, with icosahedrons achieving quicker full mixing. These results align with experimental findings, further validating the simulation approach.
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•Developed 3D GPU-parallel framework for enhanced efficiency of non-spherical DEM solver.•Uses GJK-EPA algorithms for convex polyhedral contact detection and resolution strategy.•Stability & robustness is tested using cubes stacking & polyhedral particle packing fractions.•Validated mass-flowrates & angle of repose for different shape particles in hopper & tumbler.•Initial mixing rate is higher for spherical shapes, but full mixing is slower than polyhedral. |
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| AbstractList | Particle dynamics simulations face a significant challenge in understanding the intricate behaviors of convex polyhedral particles due to their complex geometries and interactions. DEM emerges as a key method, illuminating the concealed intricacies of these geometric entities. Traditional algorithms often require cumbersome processes to check each type of contact individually. However, Gilbert–Johnson–Keerthi’s (GJK) and the expanding polytope algorithm (EPA) provide efficient numerical solutions for polyhedral contact detection and contact resolution. These Minkowski difference-based methods streamline contact detection and overlap computation, paving the way for deeper exploration of three-dimensional contact theory within DEM simulations. By leveraging GPU computational power, this paper outlines key algorithmic steps and verifies the solver’s accuracy through comparison with simulated and experimental data, with an average deviation of less than 5%. This study explores the impact of particle shape on the dynamics and mechanical behavior of densely packed systems, particularly in hoppers and tumblers. Spherical particles discharge faster but mix more slowly than polyhedral shapes, with icosahedrons achieving quicker full mixing. These results align with experimental findings, further validating the simulation approach.
[Display omitted]
•Developed 3D GPU-parallel framework for enhanced efficiency of non-spherical DEM solver.•Uses GJK-EPA algorithms for convex polyhedral contact detection and resolution strategy.•Stability & robustness is tested using cubes stacking & polyhedral particle packing fractions.•Validated mass-flowrates & angle of repose for different shape particles in hopper & tumbler.•Initial mixing rate is higher for spherical shapes, but full mixing is slower than polyhedral. Particle dynamics simulations face a significant challenge in understanding the intricate behaviors of convex polyhedral particles due to their complex geometries and interactions. DEM emerges as a key method, illuminating the concealed intricacies of these geometric entities. Traditional algorithms often require cumbersome processes to check each type of contact individually. However, Gilbert–Johnson–Keerthi’s (GJK) and the expanding polytope algorithm (EPA) provide efficient numerical solutions for polyhedral contact detection and contact resolution. These Minkowski difference-based methods streamline contact detection and overlap computation, paving the way for deeper exploration of three-dimensional contact theory within DEM simulations. By leveraging GPU computational power, this paper outlines key algorithmic steps and verifies the solver’s accuracy through comparison with simulated and experimental data, with an average deviation of less than 5%. This study explores the impact of particle shape on the dynamics and mechanical behavior of densely packed systems, particularly in hoppers and tumblers. Spherical particles discharge faster but mix more slowly than polyhedral shapes, with icosahedrons achieving quicker full mixing. These results align with experimental findings, further validating the simulation approach. |
| ArticleNumber | 120407 |
| Author | Banerjee, Raja Mangadoddy, Narasimha Mittal, Aman |
| Author_xml | – sequence: 1 givenname: Aman surname: Mittal fullname: Mittal, Aman organization: Department of Chemical Engineering, IIT Hyderabad, Sangareddy (M), 502285, Telangana, India – sequence: 2 givenname: Narasimha orcidid: 0000-0002-3123-2811 surname: Mangadoddy fullname: Mangadoddy, Narasimha email: narasimha@che.iith.ac.in organization: Department of Chemical Engineering, IIT Hyderabad, Sangareddy (M), 502285, Telangana, India – sequence: 3 givenname: Raja surname: Banerjee fullname: Banerjee, Raja organization: Department of Mechanical & Aerospace Engineering, IIT Hyderabad, Sangareddy (M), 502285, Telangana, India |
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