Nonequilibrium phase transition in the sedimentation of reproducing particles.

Nonequilibrium phase transition in the sedimentation of reproducing particles.
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再生颗粒沉降中的非平衡相变。

DOI:
10.1103/physrevlett.101.100602
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发表时间:
2008
影响因子:
8.6
通讯作者:
Barrett-Freeman C
Barrett-Freeman C
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Barrett-Freeman C

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我们通过数值和分析方法研究活性、繁殖颗粒的沉积悬浮液的动力学,例如在重力场中生长的细菌。在稳态下,我们发现“沉降”状态(类似于被动胶体的沉降平衡)和“均匀”状态之间的非平衡相变,其中除了样品的顶部和底部之外,颗粒密度在所有区域都是恒定的。我们讨论了颗粒密度波动在定位相变点方面的重要性,并报告了早期的沉降动力学。
We study numerically and analytically the dynamics of a sedimenting suspension of active, reproducing particles, such as growing bacteria in a gravitational field. In steady state we find a nonequilibrium phase transition between a “sedimentation” regime, analogous to the sedimentation equilibrium of passive colloids, and a “uniform” regime, in which the particle density is constant in all but the top and bottom of the sample. We discuss the importance of fluctuations in particle density in locating the phase-transition point, and report the kinetics of sedimentation at early times.
DOI: 10.1103/physreve.56.2597
发表时间: 1997-09-01
期刊: PHYSICAL REVIEW E
影响因子: 2.4
作者:
Brunet, E;Derrida, B
通讯作者: Derrida, B
DOI: 10.1016/s0006-3495(90)82436-x
发表时间: 1990-10-01
影响因子: 3.4
作者:
BERG, HC;TURNER, L
通讯作者: TURNER, L