Confined cubic blue phases under shear.
Confined cubic blue phases under shear.
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剪切下的受限立方蓝相。
DOI：
10.1088/0953-8984/24/28/284127
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Henrich O
中科院分区：
文献类型：
--
作者：
Henrich O
我们通过晶格玻尔兹曼模拟研究了剪切流下受限立方蓝相的行为。我们重点关注两个实验观察到的相，蓝相 I 和蓝相 II。蓝相 II 的向错网络在剪切作用下不断断裂和重组，导致及时的振荡应力响应。振荡仅对于非常薄的样品是有规律的。对于较厚的样本，剪切会导致部分网络沿涡度方向发生“粘滑”运动。蓝相 I 的反应非常不同：无论系统大小如何，其缺陷网络在剪切力下都会经历看似混乱的重排。
We study the behaviour of confined cubic blue phases under shear flow via lattice Boltzmann simulations. We focus on the two experimentally observed phases, blue phase I and blue phase II. The disclination network of blue phase II continuously breaks and reforms under shear, leading to an oscillatory stress response in time. The oscillations are only regular for very thin samples. For thicker samples, the shear leads to a'stick–slip'motion of part of the network along the vorticity direction. Blue phase I responds very differently: its defect network undergoes seemingly chaotic rearrangements under shear, irrespective of system size.