颗粒分选斑图的阶梯式转变研究  

Stepwise transformation of granular segregation pattern

作　　者：梁嘉霖 李然[1] 徐悦 华云松[1] LIANG Jialin;LI Ran;XU Yue;HUA Yunsong(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《上海理工大学学报》2024年第6期659-666,697,共9页Journal of University of Shanghai For Science and Technology

基　　金：国家自然科学基金资助项目(12072200,12002213)。

摘　　要：为完善颗粒流态–分选斑图模型,提出了形变指数Φ量化分选斑图的转变过程。结果表明,Φ可量化不同的连续变化分选斑图,且Φ随转速呈现阶梯式变化。Φ的阶梯式变化特点说明核状斑图、花瓣斑图、条纹斑图相互转变过程中均出现过渡斑图,从而表征出了分选斑图转变过程中存在过渡区及滞后现象。最终推测出分选斑图阶梯式转变的过渡与颗粒堆积结构的弛豫特性有关,而过渡区的滞后现象则与颗粒堆积结构的记忆效应有关。In order to complete the granular flowing regime-pattern segregation pattern model,the shape change indexΦwas proposed to quantify the transformation process of segregation patterns.The results indicate thatΦcan quantify different continuous changes in segregation patterns,andΦexhibits a stepwise variation with the rotating speed.The stepwise variation feature ofΦindicates that transition patterns occur during the mutual transformation process between core patterns,petal patterns and streak patterns,thereby characterizing the existence of the transition region and its hysteresis phenomena during the segregation pattern transformation process.Finally,it is speculated that the stepwise transition of pattern transformation is related to the relaxation characteristic of the particle stacking structure,while the hysteresis phenomena within the transition region is affected by the memory effect of the particle stacking structure.

关 键 词：颗粒分选 尺寸分选 滞后效应 形变指数 

分 类 号：TN29[电子电信—物理电子学]