Study on simulation and aspirated-air type experiment of fresh tea leaf with air suction based on CFD–DEM coupling

IF 2.7 3区 农林科学 Q3 ENGINEERING, CHEMICAL
Xu Zhang, Xinyu Zhu, Kai Yu
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引用次数: 0

Abstract

In this study, a computational fluid dynamics and discrete element (CFD–DEM) coupling model for sorting fresh tea leaves by aspirated-air type was established, an experimental study of adsorption on bench was carried out, and computational fluid dynamics (fluent) was used to analyze the flow characteristics of two kinds of air-suction tea leaf models, The coupling model of CFD–DEM is established, the motion process of fresh tea leaves from being adsorbed by a porous turntable to moving and falling with the turntable was simulated, 3D printing technology was used to print the key parts of the air suction tea leaf sorting equipment, and the porous turntable adsorption test of air suction tea leaf sorting was carried out. The results show that the model with the falling guard device has no airflow at the hole of the porous turntable, and the gas field flow characteristics are stable, which can ensure the smooth falling of fresh tea leaves; The results of the bench test for the separation of fresh tea leaves by air suction are the same as those simulated by the established CFD–DEM coupling model, which indicates that the establishment of the CFD–DEM coupling model and the simulation parameters are reasonable, and the coupling model lays a foundation for the later optimization and design of the multi-scale air suction separation mechanism for tea particles.

Practical applications

This research is applied to the field of food engineering and sorting of fresh tea leaves. This research innovatively proposes the principle of air-suction sorting of fresh tea leaves. The air sucked in by negative pressure can carry out the next operation and save energy better. In this study, a CFD–DEM coupling model for air-suction separation of fresh tea leaves was established. The key components of air-suction separation equipment were printed using 3D printing technology, and the test results were the same as the simulation results.

Abstract Image

基于 CFD-DEM 耦合的新鲜茶叶吸气模拟和吸气式实验研究
本研究建立了吸气式茶叶鲜叶分选的计算流体力学与离散元(CFD-DEM)耦合模型,进行了台架吸附实验研究,并利用计算流体力学(fluent)分析了两种吸气式茶叶模型的流动特性、建立了 CFD-DEM 耦合模型,模拟了鲜茶叶从被多孔转盘吸附到随转盘运动、下落的运动过程,利用 3D 打印技术打印了气吸茶叶分选设备的关键部件,并进行了气吸茶叶分选的多孔转盘吸附试验。结果表明,带防落装置的模型在多孔转盘孔洞处无气流,气场流动特性稳定,可保证茶叶鲜叶顺利下落;气吸茶叶鲜叶分选台架试验结果与建立的CFD-DEM耦合模型模拟结果一致,说明CFD-DEM耦合模型的建立及仿真参数合理,该耦合模型为后期茶叶颗粒多尺度气吸分选机理的优化设计奠定了基础。 实际应用 本研究应用于食品工程和茶叶鲜叶分拣领域。本研究创新性地提出了气吸分选茶叶鲜叶的原理。通过负压吸入的空气可进行下一步操作,并能更好地节约能源。本研究建立了茶叶鲜叶气吸分离的 CFD-DEM 耦合模型。利用 3D 打印技术打印了气吸分离设备的关键部件,试验结果与模拟结果一致。
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来源期刊
Journal of Food Process Engineering
Journal of Food Process Engineering 工程技术-工程:化工
CiteScore
5.70
自引率
10.00%
发文量
259
审稿时长
2 months
期刊介绍: This international research journal focuses on the engineering aspects of post-production handling, storage, processing, packaging, and distribution of food. Read by researchers, food and chemical engineers, and industry experts, this is the only international journal specifically devoted to the engineering aspects of food processing. Co-Editors M. Elena Castell-Perez and Rosana Moreira, both of Texas A&M University, welcome papers covering the best original research on applications of engineering principles and concepts to food and food processes.
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