Development of a collisional dissipation rate model for frictional cylinders
Development of a collisional dissipation rate model for frictional cylinders
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DOI：
10.1016/j.powtec.2019.01.068
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发表时间：
2020-04
影响因子：
5.2
通讯作者：
K. Buettner;Yu Guo;J. Curtis
中科院分区：
文献类型：
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作者：
K. Buettner;Yu Guo;J. Curtis
Homogeneous cooling system (HCS) and shear flow (SF) particulate systems are simulated using the discrete element method (DEM) to develop a collisional dissipation rate model for frictional cylinders. This combination of driven and undriven simulations provides a foundation of results that are not affected by particle alignment or clustering. Particle aspect ratio (AR), coefficient of restitution (e), coefficient of friction (μ), and solid volume fraction (αs) are all varied to produce a collisional dissipation rate model based on a decoupling ofeandμ. The new dissipation rate model for frictional cylinders modifies the dissipation rate model for frictionless spheres, whereeis replaced with an effective coefficient of restitution (eeff) that is a function ofμ. Analysis of the granular temperature ratio indicates that a two-fluid model describing the flow of frictional cylinders will require a rotational granular energy balance.
