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散体在回转容器内的流动普遍见于各种工业过程之中,本文模拟回转容器内散体的流动以探寻该过程的内在规律,分析散体流变的特性,建立回转圆筒内的数学模型,用CFX在转筒转速分别为2 r/min,3 r/min,4 r/min,5 r/min,10 r/min,25 r/min,50 r/min和100 r/min的条件下,模拟回转圆筒内散体的流动。模拟结果,当转筒转速<25 r/min时,散体呈滚动状态,当转筒转速升到25 r/min时,呈小瀑布流状态,当转筒转速升到50 r/min时,达到大瀑布流状态,当转筒转速继续升到100 r/min时,转简内散体呈典型的环流状态,该结果与文献结果相同,此外,模拟结果还显示,回转圆筒内散体在滚动流动状态下,流动区的厚度还会随转筒转速的增加而增大。模拟结果表明模型反映散体流动的状况比较客观,因而可为模拟回转圆筒内散体的流动相关的过程提供指导。
The flow of bulk in the rotating container is generally seen in a variety of industrial processes. This paper simulates the flow of the bulk liquid in the rotating container to explore the inherent law of the process, analyzes the rheological characteristics of the bulk, and establishes the mathematical model of the rotating cylinder With CFX at a drum speed of 2 r / min, 3 r / min, 4 r / min, 5 r / min, 10 r / min, 25 r / min, 50 r / min and 100 r / min Next, simulate the flow inside the rotating cylinder. The simulation results show that when the revolving speed is less than 25 r / min, the pulsating state is in a rolling state. When the rotational speed of the revolving cylinder rises to 25 r / min, it is in a cascade flow state. When the rotational speed of the revolving cylinder reaches 50 r / min, Reached the state of cataract flow. When the revolving speed continued to increase to 100 r / min, the turbulent flow in the turndown was typical and the result was the same as the literature. In addition, the simulation results also showed that the turbulent flow in the turbulent cylinder Under rolling flow conditions, the thickness of the flow zone also increases as the drum speed increases. The simulation results show that the model reflects the objective of the fluid flow, which can guide the flow-related process of the fluid in the rotating cylinder.