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首页> 外文期刊>Computers and Electronics in Agriculture >Quantitative analysis of flow dynamics of organic granular materials inside a versatile silo model during time-lapse X-ray tomography experiments
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Quantitative analysis of flow dynamics of organic granular materials inside a versatile silo model during time-lapse X-ray tomography experiments

机译：多功能筒仓模型中有机粒状物质流动动力学的定量分析延迟X射线断层摄影实验

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摘要

Gravitational flows, like silo discharge, vary in mode and are complex to identify since they depend on various parameters, ranging from silo structural properties to granular material properties. Moreover, the way cohesionless particles arrange themselves during the flow is still a matter of study and new experimental approaches are needed. Here, the paper introduces a new versatile silo model that was specially designed for in situ X-ray tomography studies of silo discharge for various flow conditions, namely concentric and eccentric. The presented work focuses on organic granular materials, i.e. sorghum and rice, which present relatively similar physicomechanical properties but different elongation. The high-quality tomography images combined with adequate image processing strategy allow to unambiguously analyse individual grains dynamic behaviour during silo discharge for different hopper configurations. The paper focuses on the analysis of packing density, coordination number and grain rotation changes during funnel flow. The quantitative analysis essentially shows that hopper eccentricity and particle elongation influence flow dynamics of funnel flow. The proposed experimental methodology is proven to be solid enough to investigate in more detail dynamic phenomena during silo discharge. It can also serve as a strong baseline for numerical calibration and predictions.
机译：引力流动，如筒仓放电，在模式中变化并且是复杂的，以识别，因为它们取决于各种参数，从碱结构性质到粒状物质。此外，在流动过程中粘性粒子排列的方式仍然是一个研究，需要新的实验方法。在此，本文介绍了一种新的多功能筒仓模型，专门设计用于各种流动条件的筒仓放电的原位X射线层析研究，即同心和偏心。所呈现的工作侧重于有机粒状材料，即高粱和大米，其具有相对相似的物理机械性能，但伸长率不同。高质量的断层摄影图像与充足的图像处理策略相结合，允许明确地分析在筒仓放电期间的单个谷物动态行为以进行不同的料斗配置。本文侧重于漏斗流动期间填充密度，配位数和晶粒旋转变化的分析。定量分析基本上表明料斗偏心和粒子伸长率影响漏斗流动的流动动力学。拟议的实验方法被证明是足够稳定的，以在筒仓放电期间更详细地调查动态现象。它还可以作为数值校准和预测的强大基线。

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