Hydrodynamic suppression of phase separation in active suspensions.
Hydrodynamic suppression of phase separation in active suspensions.
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DOI：
10.1103/physreve.90.032304
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发表时间：
2012-10
期刊：
影响因子：
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通讯作者：
Ricard Matas-Navarro;R. Golestanian;T. Liverpool;S. Fielding
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文献类型：
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作者：
Ricard Matas-Navarro;R. Golestanian;T. Liverpool;S. Fielding
我们用流体动力学模拟了一个在牛顿流体中蠕动的活动圆盘悬浮液。我们探索数值的蠕动面积分数从稀到密堆积的全范围，并表明，“运动诱导相分离，”这是最近提出的一般出现在活性物质，并已被视为在模拟活动的布朗磁盘，强烈抑制流体动力学相互作用。我们给出了一个参数，为什么这应该是这样的情况下，并支持它与对应的模拟活动布朗磁盘的参数制度，提供了一个更接近的对应流体动力学悬浮液比以前的研究。
We simulate with hydrodynamics a suspension of active disks squirming through a Newtonian fluid. We explore numerically the full range of squirmer area fractions from dilute to close packed and show that "motility induced phase separation," which was recently proposed to arise generically in active matter, and which has been seen in simulations of active Brownian disks, is strongly suppressed by hydrodynamic interactions. We give an argument for why this should be the case and support it with counterpart simulations of active Brownian disks in a parameter regime that provides a closer counterpart to hydrodynamic suspensions than in previous studies.