Please use this identifier to cite or link to this item:
https://doi.org/10.1063/1.4996943
Title: | An investigation of the effect of aspect and compression ratios on sediment dispersion using discrete element modelling | Authors: | Wang D. Tan D.S. |
Keywords: | Compression ratio (machinery) Particles (particulate matter) Concentration-dependent Discrete Element Modelling Fixed numbers Granular media Large aspect ratio Sediment dispersions Small aspect ratio Theoretical modeling Aspect ratio |
Issue Date: | 2017 | Citation: | Wang D., Tan D.S. (2017). An investigation of the effect of aspect and compression ratios on sediment dispersion using discrete element modelling. AIP Advances 7 (12) : 125227. ScholarBank@NUS Repository. https://doi.org/10.1063/1.4996943 | Abstract: | We use discrete element modelling to simulate a system of sand being released underwater, similar to the process of releasing sediment tailings back into the sea in nodule harvesting, in 2D. The force model includes concentration-dependent drag, buoyancy, 'added mass' and Stokeslet disturbance. For a fixed number of uniform-sized particles, we vary the aspect ratio and the compression ratio of the rectangular mass of granular media pre-release. We observed that the spreading leads to a nonlinear increase with aspect ratio. On the other hand, when the compression ratio is increased, the total spreading increases; however the spread of the bulk of the sand decreases at small aspect ratios and increases at large aspect ratios. We proposed a simple theoretical model for the horizontal spreading which depends on both the aspect and compression ratios. © 2017 Author(s). | Source Title: | AIP Advances | URI: | https://scholarbank.nus.edu.sg/handle/10635/174608 | ISSN: | 2158-3226 | DOI: | 10.1063/1.4996943 |
Appears in Collections: | Elements Staff Publications |
Show full item record
Files in This Item:
File | Description | Size | Format | Access Settings | Version | |
---|---|---|---|---|---|---|
10_1063_1_4996943.pdf | 9.69 MB | Adobe PDF | OPEN | Published | View/Download |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.