Development of Dust Whirls and Similar Small-Scale Vortices*
Development of Dust Whirls and Similar Small-Scale Vortices*
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尘埃漩涡和类似小规模漩涡的发展*
DOI：
10.1175/1520-0477-29.3.106
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发表时间：
1948
影响因子：
8
通讯作者：
N. R. Williams
中科院分区：
文献类型：
--
作者：
N. R. Williams
美国气象局观测到的沙尘暴。S.介绍了海军轨道器试验站，并对它们的行为进行了解释。结果表明，虽然尘埃漩涡形成的必要条件是众所周知的，标准的理论不能令人满意地解释旋涡运动的动力学。现场观测、室内实验和理论研究都表明，剪切运动是粉尘涡旋形成的一个重要因素。小尺度对流的形成机制并不像通常所认为的那样简单，而是与沙尘暴的发展过程密切相关。
Dust whirls observed at the U. S. Naval Ordnance Test Station are described, and explanations are given for their behavior. It is shown that, although the conditions necessary for dust whirl formation are well-known, standard theories do not explain satisfactorily the dynamics of the vortex motion. Field observations, laboratory experiments, and theory all indicate that shearing motion is an important factor in dust whirl formation. It is suggested that the mechanism of small-scale convection currents is not so simple as usually assumed, but is related in many respects to the processes involved during the development of dust whirls.