Vortex flow generated by a magnetic stirrer
Vortex flow generated by a magnetic stirrer
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DOI：
10.1119/1.2772287
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发表时间：
2007-12-01
影响因子：
0.9
通讯作者：
Tel, Tamas
中科院分区：
文献类型：
--
作者：
Halasz, Gabor;Gyuere, Balaks;Tel, Tamas
本文研究了圆柱形容器中磁力搅拌器产生的流动。通过光学观察、粒子图像测速测量以及粒子和染料跟踪方法。切向流是一个理想的漩涡外的核心，但内部下降流发生强烈的射流在非常中间。在核心区域中，染料图案在数分钟内保持可见，表明在该区域中混合效率低。定量测量的结果可以通过依赖于搅拌棒的旋转频率的简单关系来描述。切向流类似于大的大气涡旋，如沙尘暴和龙卷风。2007年美国物理教师协会。
We investigate the flow generated by a magnetic stirrer in cylindrical containers. by optical observations, particle image velocimetry measurements, and particle and dye tracking methods. The tangential flow is that of an ideal vortex outside a core, but inside downwelling occurs with a strong jet in the very middle. In the core region dye patterns remain visible over minutes indicating inefficient mixing in this region. The results of quantitative measurements can be described by simple relations that depend on the stirring bar's rotation frequency. The tangential flow is similar to that of large atmospheric vortices such as dust devils and tornadoes. (0 2007 American Association of Physics Teachers.