Ice particles trapped by temperature gradients at mbar pressure.
Ice particles trapped by temperature gradients at mbar pressure.
复制标题
冰粒在毫巴压力下被温度梯度捕获。
DOI：
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发表时间：
2011
影响因子：
1.6
通讯作者：
C. Dürmann
中科院分区：
文献类型：
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作者：
T. Kelling;G. Wurm;C. Dürmann
在实验室实验中，我们观察到夹带在低压大气（~1 mbar）中的冰粒（≤100 μm）在不同温度下被三个水库之间的温度梯度捕获。约束元件是250 K下的珀耳帖元件（底部）、77 K下的液氮储存器（顶部）以及293 K下的周围真空室。粒子悬浮和捕获是由热泳，电泳和重力的相互作用来模拟的。许多冰粒被同时捕获在彼此至少长达几分钟的近空间距离内，并可用于进一步的实验。
In laboratory experiments we observe that ice particles (≤100 μm) entrained in a low pressure atmosphere (~1 mbar) get trapped by temperature gradients between three reservoirs at different temperature. Confining elements are a peltier element at 250 K (bottom), a liquid nitrogen reservoir at 77 K (top), and the surrounding vacuum chamber at 293 K. Particle levitation and trapping is modeled by an interplay of thermophoresis, photophoresis, and gravity. A number of ice particles are trapped simultaneously in close spatial distance to each other at least up to minutes and are accessible for further experiments.