Reduction in minimum fluidization velocity and minimum bubbling velocity in gas-solid fluidized beds due to vibration
Reduction in minimum fluidization velocity and minimum bubbling velocity in gas-solid fluidized beds due to vibration
复制标题
由于振动导致气固流化床中的最小流化速度和最小鼓泡速度降低
DOI：
10.1016/j.powtec.2021.01.023
复制
发表时间：
2021
影响因子：
5.2
通讯作者：
C. Müller
中科院分区：
文献类型：
--
作者：
C. McLaren;J. P. Metzger;C. Boyce;C. Müller
气固流化床的振动通常用于使粘性颗粒流化;然而，它也被证明会降低最小流化速度（Umf）。本文通过实验表明，振动可以降低Geldart组B和D颗粒的Umf和最小鼓泡速度（UmB）。当表观气速介于Umf和Umb之间时，Umf和Umb随振动频率和振幅的增加而减小，在各种振动条件下，Umf和Umb随振动强度（即振动加速度峰值与重力加速度之比）的变化关系可沿着一条曲线绘制。振动引起的Umfand Umbdue的变化不受颗粒密度变化的显著影响，但受颗粒直径变化的非单调影响。
Vibration of gas-solid fluidized beds is often used to enable fluidization of cohesive particles; however, it has also been shown to reduce the minimum fluidization velocity (Umf). Here, we show via experiments that vibration can reduce bothUmfand the minimum bubbling velocity (Umb) in Geldart Group B and D particles. We observe thatUmfis reduced more thanUmb, thereby creating a densely packed, bubble-free fluidization state when the superficial gas velocity is in betweenUmfandUmb.UmfandUmbdecrease with increasing vibration frequency and amplitude and the results forUmfandUmbacross a variety of vibration conditions could be plotted along a single curve when plotted versus vibration strength, i.e. the ratio of peak vibration acceleration to gravitational acceleration. Changes inUmfandUmbdue to vibration are not affected significantly by changing particle density, but in a non-monotonic way by changing particle diameter.
流式细胞术分析胃癌患者腹腔内免疫细胞
DOI：
--
发表时间：
2022
期刊：
影响因子：
--
作者：
髙橋和也;大澤英之;金丸理人;倉科憲太郎;齋藤心;山口博紀;細谷好則;北山丈二,佐田尚宏
通讯作者：
北山丈二,佐田尚宏