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首页> 外文期刊>Physical review, E. Statistical physics, plasmas, fluids, and related interdisciplinary topics >Electroconvection in nematic liquid crystals with positive dielectric and negative conductivity anisotropy - art. no. 051713
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Electroconvection in nematic liquid crystals with positive dielectric and negative conductivity anisotropy - art. no. 051713

机译：具有正介电常数和负电导率各向异性的向列液晶的电对流-艺术。没有。 051713

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摘要

Electroconvection in an unusual nematic compound with strongly positive dielectric anisotropy and negative anisotropy of the conductivity is investigated. For homeotropic alignment, where one has a direct transition to rolls or squares depending on the frequency of the applied voltage, we present a quantitative theory. From the comparison we infer values for some viscosities, which are rather unusual, but not unreasonable in view of the vicinity of the nematic-smectic transition. For planar alignment, electroconvection sets in above a splay Freedericksz transition with "parallel rolls," which is also captured by the theory. [References: 32]
机译：研究了一种具有强正介电各向异性和负电导率各向异性的不寻常向列化合物的电对流。对于垂直排列，根据施加电压的频率，人们可以直接转换为滚动或正方形，我们提出了一种定量理论。从比较中我们推断出某些粘度的值，这是很不寻常的，但鉴于向列-近晶相转变的距离，这并不是不合理的。对于平面对准，电对流通过“平行滚动”在张开的Freedericksz过渡上方设置，这也被理论捕获。 [参考：32]

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