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Numerical and experimental verification of a damping model used in DEM

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Abstract

This paper presents a study on the damping ratio \(({\upbeta })\) used in discrete element simulations. Physical experiments are performed by dropping particles from a predetermined height. Two kinds of granular particles, aluminum and steel spheres, are used. The size of these particles are the same. The process of particle depositing under gravity is simulated using the discrete element method. The experimental observation is compared with the numerical result to identify the appropriate \({\upbeta }\). The result indicates that the appropriate damping ratio used in discrete element simulations is between 0.2 and 0.3 %. Various \({\upbeta }\) are then used in the numerical simulations to study the effect of \({\upbeta }\) on the dropping process. The final height of the sample relates to \({\upbeta }\) and the drop height. The effect of \({\upbeta }\) is more profound for small drop height. For greater drop height, the effect of \({\upbeta }\) is negligible.

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Acknowledgments

This work is partially supported by the National Natural Science Foundation of China (Grant Nos. 51379161 and 51322905).

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Authors and Affiliations

  1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, China

    Wei Zhou, Xing Ma, Gang Ma & Shao-Lin Li

  2. Civil Engineering Department, University of New Mexico, Albuquerque, NM, 87131, USA

    Tang-Tat Ng

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  1. Wei Zhou
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  2. Xing Ma
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  3. Tang-Tat Ng
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  4. Gang Ma
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Correspondence to Wei Zhou.

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Zhou, W., Ma, X., Ng, TT. et al. Numerical and experimental verification of a damping model used in DEM. Granular Matter 18, 1 (2016). https://doi.org/10.1007/s10035-015-0597-6

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  • DOI: https://doi.org/10.1007/s10035-015-0597-6

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