混流干燥机中谷物二维流场的模拟

SIMULATION OF TWO-DIMENSIONAL GRAIN FLOW IN MIXED FLOW DRYERS

根据散粒体力学原理,建立了混流干燥机内谷物二维流动的数学模型;设计了“气泡显示法”对主应力方向进行下测定,建立了主应力方向同流线方向的近似关系式,从而实现了数学模型的简化。针对数学模型的特点,建立了沿流线求解的差分格式及其求解方法。对模拟方法进行了实验验证,模拟结果用实验结果基本一致。本模拟方法可用于研究混流干燥机内谷物流动的一般规律,也可用于谷物干燥的模拟模型。

A mathematical model for two-dimensional grain flow in a mixed flow dryer is developed from the dispersive particle mechanics, and is validated to be in agreement with the experimental results. The model can be used for investigation into the grain flow, and also for analysis and simulation of the drying process and a part of the dryer mode!.