A lower granular temperature zone near the orifice in silos was found by speckle visibility spectroscopy technology. Surprisingly, the values of granular temperature in this area are inversely proportional to the mass discharge rate (MDR). This finding that links the macroscopic MDR with mesoscopic dynamics temperature of the particle system, is obtained by looking at the effect that different outlet sizes of silos on MDR and granular temperature field. Apart from evidencing the relevance of a parameter that has been traditionally overlooked in silos, this relationship supposes a benchmark with which to explore the influence of small orifice sizes on MDR. Among these, we found that the frequency of intermittent clogging and their dependence on the size of the outlet.

通过斑点可见光谱技术发现了筒仓孔口附近较低的颗粒温度区域。出人意料的是，该区域中的颗粒温度值与质量排放率（MDR）成反比。通过查看筒仓的不同出口尺寸对MDR和颗粒温度场的影响，可以将宏观MDR与粒子系统的介观动力学温度联系起来。除了证明孤岛上传统上被忽略的参数的相关性之外，这种关系还提供了一个基准，用于探索小孔口尺寸对MDR的影响。其中，我们发现间歇性堵塞的频率及其对出口尺寸的依赖性。