Influence of Rolling Friction Coefficient on Inter-Particle Percolation in a Packed Bed by Discrete Element Method

• Autorzy: Zhou H. , Luo Z. , Zhang T. , You Y. , Li H. , Zou Z.

Identyfikatory

DOI

10.1515/amm-2016-0291

• Języki publikacji: EN

Abstrakty

EN

Rolling friction representing the energy dissipation mechanism with the elastic deformation at the contact point could act directly on particle percolation. The present investigation intends to elucidate the influence of rolling friction coefficient on inter-particle percolation in a packed bed by discrete element method (DEM). The results show that the vertical velocity of percolating particles decreases with increasing the rolling friction coefficient. With the increase of rolling friction coefficient, the transverse dispersion coefficient decreases, but the longitudinal dispersion coefficient increases. Packing height has a limited effect on the transverse and longitudinal dispersion coefficient. In addition, with the increase of size ratio of bed particles to percolation ones, the percolation velocity increases. The transverse dispersion coefficient increases with the size ratio before D/d<14. And it would keep constant when the size ratio is greater than 14. The longitudinal dispersion coefficient decreases when the size ratio increases up to D/d=14, then increases with the increase of the size ratio. External forces affect the percolation behaviours. Increasing the magnitude of the upward force (e.g. from a gas stream) reduces the percolation velocity, and decreases the dispersion coefficient.

Słowa kluczowe

EN

inter-particle percolation; rolling friction coefficient; discrete element method;; percolation velocity; dispersion coefficient

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2016
• Tom: Vol. 61, iss. 4
• Strony: 1795--1804
• Opis fizyczny: Bibliogr. 29 poz., rys., tab., wykr., wzory

Twórcy

autor

Zhou H.

• School of Materials and Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

autor

Luo Z.

• School of Materials and Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

autor

Zhang T.

• School of Materials and Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

autor

You Y.

• School of Materials and Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

autor

Li H.

• School of Materials and Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

autor

Zou Z.

• School of Materials and Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

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Uwagi

EN

The authors would like to thank National Key Technology R&D Program in "12th Five-Year Plan" of China (Grant No. 2011BAE04B02) and National Natural Science Foundation of China (Grant No. 51174053) for their financial support.