The shadowgraph method in convection experiments
The shadowgraph method in convection experiments
复制标题
对流实验中的阴影图法
DOI：
10.1007/bf00193424
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发表时间：
1989
影响因子：
2.4
通讯作者：
I. Rehberg
中科院分区：
文献类型：
--
作者：
S. Rasenat;G. Hartung;B. Winkler;I. Rehberg
本文将阴影法应用于液晶中的热对流实验和电流体动力学对流实验。在这两种情况下，对流导致折射率的空间周期性场，引起通过细胞的平行光的空间周期性强度调制。接近对流的开始，温度或指向矢场由线性稳定性分析给出。知道了这些函数，就有可能用阴影法来确定它们的振幅。该方法演示使用各种例子的热和EHC对流实验。
The shadowgraph method is applied to thermal convection experiments and electro-hydrodynamic convection (EHC) in nematic liquid crystals. In both cases convection leads to a spatially periodic field of the refractive index causing a spatially periodic intensity modulation of parallel light passing the cell. Close to the onset of convection the temperature or director field is given by linear stability analysis. Knowing these functions the determination of their amplitudes becomes possible by means of the shadowgraph method. The method is demostrated using various examples of thermal and EHC convection experiments.