摘要：采用离散模型模拟了水平圆筒型混合机中1000个 颗粒混合的全过程‚分析了颗粒流型的变化规律和混合曲 线‚得到了颗粒由相对静止到开始下滑的塌落过程‚所得结 果与已知实验结果符合很好‚这有助于揭示混合机内部颗粒的运动规律。 

关键词：颗粒混合；离散模型；计算机模拟

Abstract：T he granular material in a cylinder vessel undergoing rotational motions is modeled using a discrete element method． T he mixing phenomena and average velocity fields are studied‚ and the first avalanche is also simulated in details．All simulation results appear to agree well with experimental results and obser vations． 

Keywords：granular mixing；discrete element model；simulation