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摘要翻译：
活性液晶或活性凝胶是可以物理实现的软材料，例如通过制备与分子马达相互作用的细胞骨架丝溶液。通过格子Boltzmann模拟数值求解液晶的运动方程，研究了具有不同边界条件的平板状液晶的流体力学性质。在所有情况下，我们发现有源液晶在稳态下都能维持自发流动，与无源液晶相反，这与最近的理论预测是一致的。我们进一步发现，对于任何活性参数值，边界处的冲突锚定条件都会导致自发流动，而对于所有边界处的非挫败锚定，只有当活性超过一个临界阈值时，自发流动才会发生。我们最后讨论了几种情况下导致稳态的动力学途径。
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英文标题：
《Lattice Boltzmann simulations of spontaneous flow in active liquid
crystals: the role of boundary conditions》
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作者：
D. Marenduzzo, E. Orlandini, M. E. Cates, J. M. Yeomans
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最新提交年份：
2007
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分类信息：
一级分类：Physics 物理学
二级分类：Soft Condensed Matter 软凝聚态物质
分类描述：Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜，聚合物，液晶，玻璃，胶体，颗粒物质
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一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
Active liquid crystals or active gels are soft materials which can be physically realised e.g. by preparing a solution of cytoskeletal filaments interacting with molecular motors. We study the hydrodynamics of an active liquid crystal in a slab-like geometry with various boundary conditions, by solving numerically its equations of motion via lattice Boltzmann simulations. In all cases we find that active liquid crystals can sustain spontaneous flow in steady state contrarily to their passive counterparts, and in agreement with recent theoretical predictions. We further find that conflicting anchoring conditions at the boundaries lead to spontaneous flow for any value of the 'activity' parameter, while with unfrustrated anchoring at all boundaries spontaneous flow only occurs when the activity exceeds a critical threshold. We finally discuss the dynamic pathway leading to steady state in a few selected cases.
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PDF链接：
https://arxiv.org/pdf/706.4174
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